Results 91 to 100 of about 13,318 (257)

OCCURRENCE OF LIASSIC FAUNAS AT WAANEY (UANEI) PROVINCE OF BAY, SOUTH—WESTERN SOMALIA

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2020
The sequence exposed at Waaney (South—western Somalia) consists, from bottom to top, of the following horizons: A) Blackish marly limestones, thickness 20 m; B) Grey and greenish marls and shales, thickness 10 m; C) Vacuolar yellowish—grey limestone ...
PAOLO CANUTI   +3 more
doaj  

Petroleum geology of the Upper Jurassic – Lower Cretaceous of East and North-East Greenland: Blokelv-1 borehole, Jameson Land Basin: Biostratigraphy of the Hareelv Formation (Upper Jurassic) in the Blokelv-1 core, Jameson Land, central East Greenland [PDF]

open access: yesGeological Survey of Denmark and Greenland Bulletin, 2018
The Hareelv Formation in the Blokelv-1 core is biostratigraphically subdivided by means of ammonite and dinoflagellate cyst stratigraphy. The succession ranges from the Oxfordian C. densiplicatum Chronozone to the Volgian P. elegans Chronozone.
Peter Alsen, Stefan Piasecki
doaj  

First meeting of the Research Group for Paleobiology and biostratigraphy of the ammonites [PDF]

open access: yes, 2012
The Laboratory of the “Research Group for Paleobiology and biostratigraphy of the Ammonites” (G.P.A; homepage: http://laboratoire.gpa.pagespersoorange. fr) is localised in Southeastern France, in the Alpes de HauteProvence near DignelesBains.
Bersac, Stéphane, Bert, Didier
core  

The Jurassic of North-East Greenland: Maximum Middle Jurassic transgression in East Greenland: evidence from new ammonite finds, Bjørnedal, Traill Ø [PDF]

open access: yesGeological Survey of Denmark and Greenland Bulletin, 2004
A Middle – lower Upper Jurassic sandstone-dominated succession, more than 550 m thick, with mudstone intercalations in the middle part is exposed in Bjørnedal on Traill Ø, North-East Greenland.
Alsen, Peter, Surlyk, Finn
doaj  

The Jurassic of North-East Greenland: Jurassic dinoflagellate cyst stratigraphy of Hold with Hope, North-East Greenland [PDF]

open access: yesGeological Survey of Denmark and Greenland Bulletin, 2004
Dinoflagellate cysts of the Middle–Upper Jurassic succession on northern Hold with Hope have been studied in order to establish a biostratigraphic framework and to date the succession.
Piasecki, Stefan   +3 more
doaj  

Ghost in the shell. [PDF]

open access: yesProc Natl Acad Sci U S A, 2021
Hoffmann R.
europepmc   +1 more source

Zonation by ammonites and foraminifers of the Vraconnian-Turonian interval: A comparison of the Boreal and Tethyan domains (NW Europe / Central Tunisia)

open access: yesCarnets de Géologie, 2008
Since the end of the 19th century the interval comprising the uppermost Upper Albian, the Cenomamian, the Turonian and the basal Coniacian has been subdivided, first into ammonite zones, then, beginning in the middle of the 20th century, into zones of ...
Amédro Francis, Robaszynski Francis
doaj  

Ammonites from lumpy limestones (Lower Pliensbachian, Portugal). Taphonomic analysis and palaeoenvironmental implications.

open access: yes, 2000
Preservational features of ammonites recorded in the Lower Pliensbachian lumpy limestones of the Lusitanian Basin confirm the deep marine origin previously established for this facies.
Duarte, Luís Vitor   +2 more
core   +1 more source

The physical basis of mollusk shell chiral coiling. [PDF]

open access: yesProc Natl Acad Sci U S A, 2021
Chirat R, Goriely A, Moulton DE.
europepmc   +1 more source

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