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Tytuł:
The Whitmore Point Member of the Moenave Formation: Early Jurassic Dryland Lakes on the Colorado Plateau, Southwestern USA
Autorzy:
Tanner, L.
Lucas, S.
Powiązania:
https://bibliotekanauki.pl/articles/2061348.pdf
Data publikacji:
2008
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Utah
Arizona
Hettangian
Moenave Formation
meromictic
dryland
perennia
ephemeral
lacustrine
Opis:
The Lower Jurassic Whitmore Point Member of the Moenave Formation in Arizona-Utah, USA, comprises fish- and coprolite-bearing shales, siltstones, sandstones, and minor limestones. These facies were deposited in ephemeral and perennial lakes subject to episodic desiccation and incursions of coarse clastics during floods. Meromictic conditions developed during perennial episodes, probably due to salinity stratification, which enhanced preservation of organic matter in gray to black shales. These lakes formed on the floodout of a north-northwest oriented (relative to modern geography) system of mainly ephemeral streams on a broad and open floodplain. The Whitmore Point Member both overlies and interfingers laterally with alluvial red-bed facies of the Dinosaur Canyon Member of the Moenave Formation. The vertical transition from alluvial to lacustrine sedimentation recorded by the Dinosaur Canyon and Whitmore Point members of the Moenave Formation most probably resulted from a eustatically-controlled rise in base level during the Early Jurassic (Hettangian). The Dinosaur Canyon Member also interfingers laterally with eolian dune deposits of the Wingate Sandstone, which was deposited by winds that reworked coastal plain sediments to the north of the study area. Thus, on this part of the Colorado Plateau, fluvial, lacustrine and eolian sedimentary facies were deposited contemporaneously in laterally adjacent paleoenvironments.
Źródło:
Volumina Jurassica; 2008, 6, 1; 11-21
1896-7876
1731-3708
Pojawia się w:
Volumina Jurassica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The IBA self-extracting cyclotron project
Autorzy:
Kleeven, W.
Lucas, S.
Delvaux, J.
Swoboda, F.
Zaremba, S.
Beeckman, W.
Vandeplassche, D.
Abs, M.
Powiązania:
https://bibliotekanauki.pl/articles/148721.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
cyclotron
extraction
radioisotopes
Opis:
The self-extracting cyclotron is a high-intensity 14 MeV H+ machine for isotope production. There is no electrostatic deflector. Extraction is achieved with a special shaping of the magnetic field. There are two long poles and two short poles, both with an elliptical gap profile; this provides a steep fall off of the magnetic field at the pole radii. An extraction groove is machined in the iron of one of the longer poles. First harmonic coils create a large orbit separation at the entrance of the extraction path and extract the beam. The machine is presently installed in the industrial isotope production site where the final commissioning and tests took place. Beams of more than 1.5 mA have been extracted and transported. Further development is ongoing in order to increase the current on target to at least 2 mA in the coming months. Commercial isotope production will start in the course of this year. The concept of the machine is explained and the layout of the machine and beam lines is presented. Results of orbit calculations and central region optimizations are given. Results of the measurement of extracted beam shapes and emittances are given. The progress and present status of the project are discussed.
Źródło:
Nukleonika; 2003, 48,suppl.2; 59-67
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tetrapod trace fossils from lowermost Jurassic strata of the Moenave Formation, northern Arizona, USA
Autorzy:
Tanner, L.
Lucas, S.
Powiązania:
https://bibliotekanauki.pl/articles/2061343.pdf
Data publikacji:
2008
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
burrows
tetrapod
cynodont
tritylodontid
rhizolith
Moenave
Lower Jurassic
Opis:
At Moenkopi Wash along the Ward Terrace escarpment of northern Arizona strata of the upper Dinosaur Canyon Member of the Moenave Formation contain sedimentary structures we interpret as casts of tetrapod burrows. Sandstone casts and in situ burrows occur concentrated in two horizons that extend several hundred meters along the Ward Terrace escarpment. The structures, hosted in beds of eolian sandstone, form interconnecting networks of burrows that branch at right angles. Individual burrow casts have sub-circular cross sections and consist of nearvertical tunnels and horizontal to low-angle galleries that connect to larger chambers. Most burrow casts measure 5 to 15 cm in diameter, are filled by sandstone of similar grain size as the host rock, and have walls that are unlined and lack external ornamentation. Bedding plane exposure of the lower horizon reveals that the density of burrows exceeds 30 vertical tunnels per square meter. One exposure in the upper horizon reveals burrows concentrated in a mound-like structure with 1 m of relief. Rhizoliths, distinguished from burrows by their typical smaller diameters, calcareous infilling, and downward branching, co-occur with these burrows in the upper horizon. The fossil burrows in the Moenave Formation appear to have been constructed by a fossorial tetrapod with social behavior similar to the modern Mediterranean blind mole-rat. Although no skeletal remains are associated with the burrows, the fossil record suggests that the most likely producers of the Moenave burrows were tritylodontid cynodonts.
Źródło:
Volumina Jurassica; 2008, 6, 1; 133-141
1896-7876
1731-3708
Pojawia się w:
Volumina Jurassica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Survey-based qualitative analysis of young generation perception of sustainable development in Poland
Analiza oparta na badaniach postrzegania przez młode pokolenie zrównoważonego rozwoju w Polsce
Autorzy:
Pena, Ingrid A. B.
Lucas, Isabella L.
Penna-Firme, Rodrigo
Strassburg, Bernardo
Drosik, Adam
Rubisz, Lech
Kubon, Maciej
Latala, Hubert
Grotkiewicz, Katarzyna
Kubon, Krzysztof
Batalhão, André C. S.
Latawiec, Agnieszka E.
Powiązania:
https://bibliotekanauki.pl/articles/1426963.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
sustainable development
sustainability perception
sustainability dimensions
public policies
rozwój zrównoważony
postrzeganie zrównoważonego rozwoju
wymiary zrównoważonego rozwoju
polityka publiczna
Opis:
Understanding the perception of Sustainable Development can help to identify misconceptions surrounding the concept in order to design better education plans and public policies on this subject. Evaluating the perception of sustainability issues by focusing on the young generation as is an important proxy to imagine what the future holds for in terms of addressing sustainable development. We conducted 177 in-person interviews on a heterogeneous group of students and random volunteers in four cities in Poland to assess their perception of Sustainable Development. The vast majority (89.3%) of the respondents were familiar with the term 'Sustainable Development'. However, part of them (57%) associated it only to the human and social development dimensions and its institutions, whereas 17.5% related it with its environmental aspects. The results supported by the literature review highlight challenges concerning the path towards a comprehensive perception of Sustainable Development and hence the achievement of the SDGs. Based on these results, we identify opportunities and incentives to bring Poland towards 2030 Agenda.
Zrozumienie postrzegania zrównoważonego rozwoju może pomóc w zidentyfikowaniu błędnych przekonań dotyczących tej koncepcji w celu opracowania lepszych planów edukacyjnych i polityk publicznych w tym zakresie. Ocena postrzegania kwestii zrównoważonego rozwoju poprzez skupienie się na młodym pokoleniu, jako ważny wskaźnik pozwalający wyobrazić sobie, co przyniesie przyszłość w zakresie rozwiązywania kwestii zrównoważonego rozwoju. Przeprowadziliśmy 177 wywiadów osobistych na niejednorodnej grupie studentów i przypadkowych wolontariuszy w czterech miastach w Polsce, aby ocenić ich postrzeganie zrównoważonego rozwoju. Zdecydowana większość (89,3%) respondentów zna termin „zrównoważony rozwój”. Jednak część z nich (57%) kojarzyła go tylko z wymiarem rozwoju ludzkiego i społecznego oraz jego instytucji, a 17,5% z aspektami środowiskowymi. Wyniki poparte przeglądem literatury podkreślają wyzwania dotyczące ścieżki do wszechstronnego postrzegania zrównoważonego rozwoju, a tym samym osiągnięcia celów zrównoważonego rozwoju. Na podstawie tych wyników identyfikujemy szanse i zachęty do zbliżenia Polski do Agendy 2030.
Źródło:
Agricultural Engineering; 2020, 24, 4; 75-86
2083-1587
Pojawia się w:
Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Survey-based qualitative analysis of young generation perception of sustainable development in Poland
Analiza oparta na badaniach postrzegania przez młode pokolenie zrównoważonego rozwoju w Polsce
Autorzy:
Pena, Ingrid A. B.
Lucas, Isabella L.
Penna-Firme, Rodrigo
Strassburg, Bernardo
Drosik, Adam
Rubisz, Lech
Kubon, Maciej
Latala, Hubert
Grotkiewicz, Katarzyna
Kubon, Krzysztof
Batalhão, André C. S.
Latawiec, Agnieszka E.
Powiązania:
https://bibliotekanauki.pl/articles/1427159.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
sustainable development
sustainability perception
sustainability dimensions
public policies
rozwój zrównoważony
postrzeganie zrównoważonego rozwoju
wymiary zrównoważonego rozwoju
polityka publiczna
Opis:
Understanding the perception of Sustainable Development can help to identify misconceptions surrounding the concept in order to design better education plans and public policies on this subject. Evaluating the perception of sustainability issues by focusing on the young generation as is an important proxy to imagine what the future holds for in terms of addressing sustainable development. We conducted 177 in-person interviews on a heterogeneous group of students and random volunteers in four cities in Poland to assess their perception of Sustainable Development. The vast majority (89.3%) of the respondents were familiar with the term 'Sustainable Development'. However, part of them (57%) associated it only to the human and social development dimensions and its institutions, whereas 17.5% related it with its environmental aspects. The results supported by the literature review highlight challenges concerning the path towards a comprehensive perception of Sustainable Development and hence the achievement of the SDGs. Based on these results, we identify opportunities and incentives to bring Poland towards 2030 Agenda.
Zrozumienie postrzegania zrównoważonego rozwoju może pomóc w zidentyfikowaniu błędnych przekonań dotyczących tej koncepcji w celu opracowania lepszych planów edukacyjnych i polityk publicznych w tym zakresie. Ocena postrzegania kwestii zrównoważonego rozwoju poprzez skupienie się na młodym pokoleniu, jako ważny wskaźnik pozwalający wyobrazić sobie, co przyniesie przyszłość w zakresie rozwiązywania kwestii zrównoważonego rozwoju. Przeprowadziliśmy 177 wywiadów osobistych na niejednorodnej grupie studentów i przypadkowych wolontariuszy w czterech miastach w Polsce, aby ocenić ich postrzeganie zrównoważonego rozwoju. Zdecydowana większość (89,3%) respondentów zna termin „zrównoważony rozwój”. Jednak część z nich (57%) kojarzyła go tylko z wymiarem rozwoju ludzkiego i społecznego oraz jego instytucji, a 17,5% z aspektami środowiskowymi. Wyniki poparte przeglądem literatury podkreślają wyzwania dotyczące ścieżki do wszechstronnego postrzegania zrównoważonego rozwoju, a tym samym osiągnięcia celów zrównoważonego rozwoju. Na podstawie tych wyników identyfikujemy szanse i zachęty do zbliżenia Polski do Agendy 2030.
Źródło:
Agricultural Engineering; 2020, 24, 4; 75-86
2083-1587
Pojawia się w:
Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pedogenic and lacustrine features of the Brushy Basin Member of the Upper Jurassic Morrison Formation in western Colorado: Reassessing the paleoclimatic interpretations
Autorzy:
Tanner, L.
Galli, K.
Lucas, S.
Powiązania:
https://bibliotekanauki.pl/articles/2077335.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
aridisol
inceptisol
calcrete
palustrine
lacustrine
pedogenesis
pedogeneza
jeziorny
bagienny
Opis:
Study of the pedogenic features of the Upper Jurassic Morrison Formation in western Colorado, USA, shows a clear difference in the types of paleosols between the strata of the lower and upper Brushy Basin Member. Lower Brushy Basin paleosols are mostly calcareous Aridisols with Stage I through Stage III calcrete Bk horizons, abundant root traces, occasional vertic features, but only rarely with ochric epipedons. Upper Brushy Basin paleosols are mainly thicker and commonly display ochric epipedons and well-developed Bt and Bw horizons. We assign these paleosols to the order Inceptisol. Limestones occur in the Brushy Basin Member and include both uniformly micritic limestones and limestones with strongly brecciated textures. The former contain sparse body fossils and charophyte debris, while the latter are characterized by clotted-peloidal fabrics with circumgranular cracking and silica replacement. We interpret these limestones as the deposits of carbonate in small water bodies on a low-gradient flood plain, with the textures resulting from pedogenic reworking of the carbonate sediment. We find no evidence for the presence of extensive lacustrine or wetlands (Lake T’oo’dichi’) deposits in the study area. The paleoclimate suggested by all of these features is strongly seasonal, but subject to variations on orbital (precessional and higher) timescales causing intervals of semi-aridity during weaker monsoons, to alternate with sub-humid periods during stronger monsoons. The apparent long-term change in climate during Brushy Basin deposition potentially resulted from northward drift of North America.
Źródło:
Volumina Jurassica; 2014, 12, 2; 115--130
1896-7876
1731-3708
Pojawia się w:
Volumina Jurassica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New data on the anatomy and relationships of the Paleocene crocodylian Akanthosuchus langstoni
Autorzy:
Hill, R.V.
Lucas, S.G.
Powiązania:
https://bibliotekanauki.pl/articles/20775.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Akanthosuchus langstoni
Alligatoroidea
Crocodylia
holotype
Paleocene
anatomy
dwarfism
paleontology
phylogenetic relationship
phylogenetic analysis
Opis:
The phylogenetic relationships of the Paleocene crocodylian Akanthosuchus langstoni are assessed using published data matrices and morphological data from the holotype and referred specimens. Cladistic analyses indicate that Akanthosuchus is unequivocally nested within Alligatoroidea. Weak support from a majority rule consensus tree indicates that Akanthosuchus may be more closely allied with alligatorines than with caimanines, but in the strict consensus tree these relationships remain ambiguous. There is no evidence from phylogenetic analyses to support the hypothesis that Akanthosuchus represents the postcrania of the Paleocene crocodylians Navajosuchus or Ceratosuchus. Growth marks observed in histological sections of osteoderms of the holotype of Akanthosuchus langstoni indicate that it was at least eight years old at the time of death. Although the individual may not have been fully mature at the time of death, lineage dwarfism cannot be ruled out as a possible reason for its relatively small size.
Źródło:
Acta Palaeontologica Polonica; 2006, 51, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lithostratigraphy of the Jurassic San Rafael Group from Bluff to the Abajo Mountains, southeastern Utah: Stratigraphic relationships of the Bluff Sandstone
Autorzy:
Lucas, S.
Powiązania:
https://bibliotekanauki.pl/articles/2077336.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Jurassic
Utah
Morrison Formation
Summerville Formation
Carmel Formation
jura
Formacja Morrisona
Formacja Summerville
Formacja Carmel
Opis:
Measured sections of Jurassic San Rafael Group strata correlated by lithostratigraphy along an ~60 km transect between Bluff and the Abajo Mountains in southeastern Utah indicate that: (1) the Carmel Formation is continuous and disconformable on the Navajo Sandstone (J-2 unconformity); (2) the Entrada Sandstone (Slick Rock Member) is continuous and conformable on the Carmel; (3) the Summerville Formation is continuous and does not intertongue with the Entrada (its base is the J-2 unconformity); (4) the Bluff Sandstone grades northward into the upper Summerville south of the Abajo Mountains; (5) the Recapture Member of the Bluff is physically continuous with at least part of the Tidwell Member of the Summerville; and (5) the base of the Salt Wash Member of the Morrison Fm. is a pervasive unconformity (J-5) with demonstrable local stratigraphic relief of up to 14 m. These observations counter previous claims of extensive Entrada-Summerville intertonguing in southeastern Utah and do not support recognition of depositional sequence boundaries in the Entrada and Summerville lithosomes. Though Entrada deposition may have been by a wet eolian system, its southeastern Utah outcrops are well to the south/ southeast of any marine and paralic facies with which the Entrada intertongues.
Źródło:
Volumina Jurassica; 2014, 12, 2; 55--68
1896-7876
1731-3708
Pojawia się w:
Volumina Jurassica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jurassic vertebrate bromalites of the western United States in the context of the global record
Autorzy:
Hunt, A.
Lucas, S.
Powiązania:
https://bibliotekanauki.pl/articles/2077333.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
bromalite
consumulite
evisceralite
Jurassic
Morrison Formation
Sundance Formation
western USA
jura
Formacja Morrisona
Formacja Sundance
USA
Opis:
The bromalite record of the western United States is quite limited, especially in contrast to the Triassic and Cretaceous records of the same region. Indeed, there are only a handful of well documented vertebrate bromalites from the Jurassic strata of the western USA, including: (1) coprolites from the nonmarine Early Jurassic Glen Canyon Group; (2) consumulites and evisceralites from the Middle Jurassic Todilto and Sundance formations; and (3) consumulites, putative coprolites and pseudobromalites from the nonmarine Upper Jurassic Morrison Formation. Early Jurassic red beds are notably less fossiliferous than those of the Triassic (e.g., contrast the fossil record of the Chinle and Glen Canyon groups). The Middle Jurassic of the region includes several eolianites and sabkha-like deposits representing environments that preserve few bromalites. The Upper Jurassic Morrison Formation contains abundant vertebrate body fossils and many tracks but very few bromalites in contrast to many broadly similar fluvial deposits of Triassic and Cretaceous age in the same region. The global bromalite record also appears to be depauperate in the Jurassic, with a few exceptions such as marine shales and lithographic limestones in Europe (e.g., Lower Jurassic of England, Upper Jurassic Solnhofen Limestone of Bavaria). This relative lack of a global Jurassic bromalite record may in part be more a result of a lack of collection and study. However, the relative lack of nonmarine bromalites is clearly influenced by high sea levels in the Early Jurassic, a paucity of Middle Jurassic nonmarine vertebrate-bearing units and a lack, or lack of recognition of, bromalites in major Upper Jurassic nonmarine vertebrate faunas (e.g., China, Tanzania, Portugal, etc.). In the Western United States there is clearly a need for more detailed examination of known specimens (e.g., putative Morrison coprolites) and a focus on collecting more examples.
Źródło:
Volumina Jurassica; 2014, 12, 2; 151--158
1896-7876
1731-3708
Pojawia się w:
Volumina Jurassica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Injury Risk in Behind Armor Blunt Thoracic Trauma
Autorzy:
Bass, C. R.
Salzar, R. S.
Lucas, C. R.
Davis, M.
Donnellan, L.
Folk, B.
Sanderson, E.
Waclawik, S.
Powiązania:
https://bibliotekanauki.pl/articles/90978.pdf
Data publikacji:
2006
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
blunt trauma
Thora
armor
ballistic
zagrożenia zdrowia
zagrożenia mechaniczne
uszkodzenie kości
profilaktyka
środki ochrony indywidualnej
służba wojskowa
kamizelka kuloodporna
Opis:
First responders and military personnel are particularly susceptible to behind armor blunt thoracic trauma in occupational scenarios. The objective of this study was to develop an armored thorax injury risk criterion for short duration ballistic impacts. 9 cadavers and 2 anthropomorphic test dummies (AUSMAN and NIJ 0101.04 surrogate) were tested over a range of velocities encompassing low severity impacts, medium severity impacts, and high severity impacts based upon risk of sternal fracture. Thoracic injuries ranged from minor skin abrasions (abbreviated injury scale [AIS] 1) to severe sternal fractures (AIS 3+) and were well correlated with impact velocity and bone mineral density. 8 male cadavers were used in the injury risk criterion development. A 50% risk of AIS 3+ injury corresponded to a peak impact force of 24,900 ± 1,400 N. The AUSMAN impact force correlated strongly with impact velocity. Recommendations to improve the biofidelity of the AUSMAN include implementing more realistic viscera and decreasing the skin thickness.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2006, 12, 4; 429-442
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In-situ observations of devolatilisation of coal
Autorzy:
Strezov, V.
Lucas, J. A.
Osborn, S. R.
Strezov, L.
Powiązania:
https://bibliotekanauki.pl/articles/1204890.pdf
Data publikacji:
2002
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
coal
swelling
devolatilisation
tars
specific heat
reactions
Opis:
Coal devolatilisation phenomena were observed in-situ during heating. A single particle of coal of approximately 1 mm diameter was placed on a stainless steel strip heated by an alternative current source. The behaviour of the coal particle was recorded at 100 times magnification through an arrangement of a long focal distance microscope attached to a CCD camera. The two different coal types examined (thermal and coking coal) exhibited significant differences during heating. At about 460oC, during the plastic stage, the coking coal showed rapid swelling and formation of bubbles within the liquid. Unlike the coking coal, the thermal coal showed very little swelling, although devolatilisation (predominantly tars for both coals) was taking place. The volatiles were diffusing to the surface of the particle through the pores in the char, without any significant swelling. At temperatures above 600oC, significant shrinking was observed with the coking coal, while in both samples, evolution of hydrogen was monitored. These observations were compared to the measured specific heats for these coals. The specific heats showed significant differences between the samples associated with a very complex behaviour following the onset of softening. While the coking coal exhibited predominantly exothermic reactions coinciding with the observed swelling phenomena, the thermal coal showed a sequence of endothermic and exothermic reactions. The changes in the specific heats also correlated well with the observed evolution of hydrogen (and shrinking for the coking coal) at higher temperatures.
Źródło:
Polish Geological Institute Special Papers; 2002, 7; 253-258
1507-9791
Pojawia się w:
Polish Geological Institute Special Papers
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Global Jurassic tetrapod biochronology
Autorzy:
Lucas, S.
Powiązania:
https://bibliotekanauki.pl/articles/2061346.pdf
Data publikacji:
2008
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Jurassic
tetrapod
footprints
biostratigraphy
land-vertebrate faunachron
provinciality
Opis:
Jurassic tetrapod fossils are known from all of the continents, and their distribution documents a critical paleobiogeographic juncture in tetrapod evolution – the change from cosmopolitan Pangean tetrapod faunas to the provincialized faunas that characterize the late Mesozoic and Cenozoic. Two global tetrapod biochronological units (faunachrons) have been named for the Early Jurassic – Wassonian and Dawan – and reflect some Early Jurassic tetrapod cosmopolitanism. However, after the Dawan, a scattered and poorly-dated Middle Jurassic tetrapod record and a much better understood Upper Jurassic tetrapod record indicate that significant provincialization of the global tetrapod fauna had begun. Middle Jurassic tetrapod assemblages include distinct local genera of sauropod dinosaurs, which are large, mobile terrestrial tetrapods, and this suggests marked provinciality by Bajocian time. The obvious provincialism of well known Chinese Middle-Upper Jurassic dinosaur faunas also documents the end of tetrapod cosmopolitanism. The distribution of some Late Jurassic dinosaur taxa defines a province that extended from the western USA through Europe into eastern Africa. Provincial tetrapod biochronologies have already been proposed for this province and for the separate eastern Asian Late Jurassic province. Tetrapod footprints only identify two global assemblage zones, one of Early Jurassic and the other of Middle-Late Jurassic age. The incomplete state of Jurassic tetrapod biochronology reflects both an inadequate record with poor temporal constraints and a relative lack of study of the biostratigraphy of Jurassic fossil vertebrates.
Źródło:
Volumina Jurassica; 2008, 6, 1; 99-108
1896-7876
1731-3708
Pojawia się w:
Volumina Jurassica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Folding in the Middle Jurassic Todilto Formation, New Mexico-Colorado, USA
Autorzy:
Lucas, S.
Krainer, K.
Berglof, W.
Powiązania:
https://bibliotekanauki.pl/articles/2077339.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Jurassic
todilto formation
salina
microfolding
stromatolites
tepee-structures
kopalnie soli
tepee-konstrukcje
jura
Opis:
The Middle Jurassic (Callovian) Todilto Formation of northwestern New Mexico–southwestern Colorado, USA, is a carbonate/evaporite lithostratigraphic unit that was deposited in a large paralic salina culminated by a gypsiferous evaporitic lake. Intraformational folds of the limestone-dominated lower part of the Todilto Formation (Luciano Mesa Member) range in scale from millimeters to meters, and many of the large folds are the loci of uranium mineralization. A diverse literature has attributed the formation of intraformational folds of the Todilto Formation to several causes, including syndepositional or postdepositional tectonics, soft-sediment deformation due to sediment loading or gravity sliding, diagenetic alteration (primarily the hydration/crystallization of gypsum/anhydrite), the growth of stromatolitic bioherms or the formation of tepee-like structures. We examine in detail two characteristic outcrops of intraformational folds in the Todilto Formation, in west-central New Mexico, to conclude that folds and domal structures present in the Todilto limestone facies at different stratigraphic levels and at different scales have resulted from varied processes that produced dome-like stromatolitic mounds, tepee-like structures, small-scale enterolithic folds and large-scale folds of likely diagenetic origin.
Źródło:
Volumina Jurassica; 2014, 12, 2; 39--54
1896-7876
1731-3708
Pojawia się w:
Volumina Jurassica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cynodont teeth from the Carnian [Late Triassic] of Northern Italy
Autorzy:
Renesto, S
Lucas, S.G.
Powiązania:
https://bibliotekanauki.pl/articles/21889.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
paleontology
cynodont
Carnian
Late Triassic
Italy
Gorno Formation
morphology
tooth
cynodont tooth
Opis:
A jaw fragment with three teeth preserved, collected from the Gorno Formation (Carnian, Upper Triassic) of Lombardy (Italy) is described. The teeth are transversely elongated, threecusped and bear anterior and posterior cingula. Their overall morphology supports their identification as postcanines of a “eucynodontian”. The unique tooth morphology of the new specimen supports its attribution to a new genus and species, while at the same time precluding positive assignment to already known gomphodont families. There is a fairly small record of gomphodont cynodonts in Europe, so that the described specimen adds to the knowledge of the distribution and diversity of European gomphodonts and it also represents the first ever collected in Italy.
Źródło:
Acta Palaeontologica Polonica; 2009, 54, 2; 357-360
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
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