Results 171 to 180 of about 4,741,469 (223)

The evolution of the Earth's surface iron cycle. [PDF]

Proc Natl Acad Sci U S A
Scholz F, Doetterl S, Hardisty DS.
europepmc   +1 more source

Evolutionary pathway and genetic mechanisms of fin-to-limb transition in vertebrates. [PDF]

Front Cell Dev Biol
Bayramov AV, Mednikov DN, Zaraisky AG.
europepmc   +1 more source

Lowermost Carboniferous (Tournaisian) Miospore Assemblages from the July Field, Gulf of Suez, Egypt: Biostratigraphic and Palaeoenvironmental Implications. [PDF]

Life (Basel)
Maher A, Bek J.
europepmc   +1 more source

Some of the next articles are maybe not open access.

Related searches:

The Early Devonian palaeobiogeography of Eastern Australasia

Palaeogeography, Palaeoclimatology, Palaeoecology, 2016
Abstract Biogeographical analyses of Devonian Australasia (Australia and New Zealand) have previously presented a narrative approach to the interrelationships of continental faunal provinces. Useful for the creation of biotic hypotheses, similarities and differences between biotic provinces remains untested.
Elizabeth M. Dowding, Malte C. Ebach
openaire   +1 more source

The Base of the Devonian and an Early Devonian Graptolite Succession in Central Nevada

Geological Society of America Bulletin, 1970
A consensus has developed among stratigraphers interested in the Silurian-Devonian boundary that the Monograptus uniformis graptohte zone should be the base of the Devonian. Use of that zone as the base of the Devonian makes correlation with it relatively easy as significant evolutionary developments m several fossil groups have been recognized close ...
openaire   +1 more source

Early and Middle Devonian gastropod biogeography

Geological Society, London, Memoirs, 1990
Abstract Early and Middle Devonian gastropods show biogeographic patterns remarkably similar to those of better studied faunal groups of this same interval, notably articulate brachiopods, rugose corals, and trilobites. Three biogeographic realms are recognized: Old World, Eastern Americas, and Malvinokaffric Realms.
R. B. Blodgett, D. M. Rohr, A. J. Boucot
openaire   +1 more source

Early Devonian Gas in Northern West Virginia and Pre-Devonian Oil Prospects

AAPG Bulletin, 1950
ABSTRACT Since the discovery of gas in the Oriskany sand in north-central Pennsylvania in 1930, nineteen deep wells have been drilled to the Oriskany on seven major folds 30–40 miles southeast of the old oil and gas fields in northern West Virginia. This exploratory drilling has resulted in the discovery of two gas fields known as the
Frank Reeves, Paul H. Price
openaire   +1 more source

The oldest articulated chondrichthyan from the Early Devonian period

Nature, 2003
Chondrichthyans (including living sharks, skates, rays and chimaeras) have a fossil record of scales and dermal denticles perhaps dating back to the Late Ordovician period, about 455 million years ago. Their fossil tooth record extends to the earliest Devonian period, almost 418 million years ago, whereas the oldest known articulated shark remains date
Randall F, Miller, Richard, Cloutier, Susan, Turner   +2 more
openaire   +2 more sources

A Devonian Spinneret: Early Evidence of Spiders and Silk Use

Science, 1989
A nearly complete spider spinneret was found in Middle Devonian rocks (about 385 to 380 million years old) near Gilboa, New York. This is the earliest evidence yet discovered for silk production from opisthosomal spigots, and therefore for spiders. Two previously known Devonian fossils described as spiders lack any apomorphies of the order Araneae and ...
Shear, W. A., Palmer, J. M., Coddington, Jonathan A., Bonamo, P. M.   +3 more
openaire   +2 more sources