Results 121 to 130 of about 292 (159)

Marine microfossils: Tiny archives of ocean changes through deep time. [PDF]

open access: yesAIMS Microbiol
Sremac J   +4 more
europepmc   +1 more source

The Cabrières Biota (France) provides insights into Ordovician polar ecosystems. [PDF]

open access: yesNat Ecol Evol
Saleh F   +20 more
europepmc   +1 more source

Influence of quartz types on mechanical parameters in the early silurian Longmaxi shale, Sichuan Basin. [PDF]

open access: yesSci Rep
Zhang Q   +9 more
europepmc   +1 more source

The rise of lichens during the colonization of terrestrial environments. [PDF]

open access: yesSci Adv
Becker-Kerber B   +31 more
europepmc   +1 more source

Age-dependent extinction and the neutral theory of biodiversity. [PDF]

open access: yesProc Natl Acad Sci U S A
Saulsbury JG   +4 more
europepmc   +1 more source

Graptolite ontogeny and the size of the graptolite zooid

Geological Magazine, 1995
AbstractTwo methods of estimating the size of the graptolite zooid are described and discussed. It is possible to size a zooid by reference to cortical bandages or with reference to modem Rhabdopleura and its tubes. These two methods give very different results, with the first suggesting small zooids relative to thecal size and the second suggesting ...
Susan Rigby, Margaret Sudbury
openaire   +1 more source

Extinction of the graptolites

Geological Society, London, Special Publications, 1979
Summary Graptoloids became extinct in latest Early Devonian (Pragian) times, and dendroids in the late Carboniferous. There is insufficient information for the other six graptolite orders to suggest when they might have become extinct, so that in these cases it is impossible as yet to speculate how extinction occurred.
T. N. Koren’, R. B. Rickards
openaire   +1 more source

Are the Graptolites Bryozoans?

Geological Society of America Bulletin, 1931
Introduction The authors, while enjoying the ease of a steamer chair on a joint trip to Europe in 1922, and discussing somewhat idly at first the taxonomic position of the graptolites, discovered to their mutual great satisfaction that they had arrived independently at the conviction that the graptolites are an early and long extinct branch of the ...
E. O. ULRICH, R. RUEDEMANN
openaire   +1 more source

Home - About - Disclaimer - Privacy