Results 31 to 40 of about 765 (180)
Ecological estimation of using ammonites in jewelry and interior goods
RUDN Journal of Ecology and Life Safety, 2011 Mineral composition has been studied in details, estimation of radiational characteristics of ammonites using in jewelry and interior goods has been conducted.
D A Petrochenkov
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Sedimentology, Volume 73, Issue 5, Page 1750-1798, August 2026.ABSTRACT Features considered indicative of hyperpycnites and intrabasinal turbidites overlap. Outcrop study presented here suggests that the Westward Ho! Formation forms an 800 m high deepwater‐slope system dominated by hyperpycnites. Taking this unit, and other successions where hyperpycnites have been described, as having been deposited solely from ...
Tony Reynolds
wiley +1 more source
Extroparvum occidentale gen. et sp. nov. and the Cretaceous diversification of Lauraceae
American Journal of Botany, Volume 113, Issue 7, July 2026.Abstract Premise The fossil record of Lauraceae extends back to the Early Cretaceous and comprises numerous flowers. However, phylogenetic relationships of many of these fossil flowers remain unresolved. To better understand the early evolutionary history of Lauraceae, we conducted phylogenetic analyses of living and extinct members of the family and ...
Keana K. Tang +2 more
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The Jurassic of North-East Greenland: Jurassic dinoflagellate cysts from Hochstetter Forland, North-East Greenland [PDF]
Geological Survey of Denmark and Greenland Bulletin, 2004 Three sections in Hochstetter Forland, North-East Greenland, referred to the Jurassic Payer Dal and Bernbjerg Formations, have been analysed for dinoflagellate cysts.
Piasecki, Stefan, Stemmerik, Lars
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Ecology and Evolution, Volume 16, Issue 7, July 2026.Crab autotomy with evidence of regeneration is described for the first time in the fossil record. Autotomy is a defensive behavior that affects more males than females of Achelous monspeliensis and may be related to mating season. ABSTRACT Autotomy—the voluntary shedding of a limb as a defensive response to predation, intraspecific aggression, or ...
Carlos Neto de Carvalho, Pedro Marrecas
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Uppermost Albian biostratigraphy and chronostratigraphy
Carnets de Géologie, 2009 The Albian Stage is the highest chronostratigraphic unit of the Lower Cretaceous Series and underlies the Cenomanian Stage of the Upper Cretaceous Series.
Scott Robert W.
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Sutural simplification in Physodoceratinae (Aspidoceratidae, Ammonitina)
Estudios Geologicos, 1987 El análisis estructural de la interrelación concha-septo en algunos ammonites del Jurásico superior lleva a concluir que las simplificaciones suturales aparecidas a lo largo de la filogenia fueron originadas por alteraciones ocurridas en la morfología ...
A. Checa
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A thorny evolution: first Triassic ammonoid with a ventral apertural elongated rostrum
Papers in Palaeontology, Volume 12, Issue 4, July/August 2026.Abstract Ornamented terminal peristomes are common in ammonoids, but pronounced conch projections are rare, particularly in the Triassic. A new early Spathian assemblage from southeastern Idaho yielded two ammonoid specimens with an impressive terminal mid‐ventral elongated rostrum, documenting the first Triassic occurrence and one of the few ...
Arnaud Brayard +8 more
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Carnets de Géologie, 2008 • Chapter 1. The Aalenian-Bajocian (Middle Jurassic) of the Digne area • Chapter 2. The Global Boundary Stratotype Sections and Points (GSSP) of the Hauterivian: La Charce section (Drôme, France, Vocontian Basin) • Chapter 3.
Mattioli Emanuela +5 more
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Geologica Carpathica, 2018 Calcareous nannofossil, calpionellid and ammonite occurrences have been directly constrained across the Jurassic–Cretaceous boundary interval in the section of Kopanitsa, SW Bulgaria.
Stoykova Kristalina +3 more
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