Results 251 to 260 of about 106,743 (301)

Some Lower Cretaceous Terebratelloidea

1965
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +1 more source

Lower Cretaceous in Colorado Plateau

AAPG Bulletin, 1952
Fossil collections consisting of non-marine microfossils, plants, and mollusks have recently been made from the Cedar Mountain and Burro Canyon formations of the Colorado Plateau. The containing sediments have previously been considered to be either Jurassic or Late Cretaceous but the fossil evidence indicates early Cretaceous age.
openaire   +1 more source

Ecology of Lower Cretaceous Chalk

Proceedings, 2012
Chalk sediments, that is here biomicrite with a porosity of 10 – 50%, are widespread in the late Cretaceous of the Boreal Realm. Chalk, however, is uncommon in the Early Cretaceous where clays and mudstones dominate for example in the Lower Saxony Basin (LSB), northeast England (Speeton) and elsewhere.
openaire   +1 more source

Lower Cretaceous Carbonate Beaches: ABSTRACT

AAPG Bulletin, 1972
Several carbonate beach sequences have been recognized and studied in Lower Cretaceous shallow-marine shelf limestones of the Edwards Formation, Central and West Texas. These sandstone bodies are local features associated with exposed insular areas developed in response to remnant structural features combined with biologic and normal sedimentologic ...
openaire   +1 more source

The Mammals of the Lower Cretaceous

1984
The next 40 × 106 years spanning the Lower Cretaceous was a critical period in mammalian evolution, as it was during this time that the primitive mammals known in the Jurassic evolved into marsupials and placentals. In other words it was in the Lower Cretaceous that modern mammals first appeared; unfortunately much less is known about early Cretaceous ...
Doris M. Kermack, Kenneth A. Kermack
openaire   +1 more source

The Lower Cretaceous lizard genus Chometokadmon from Italy

Cretaceous Research, 2006
Abstract The Lower Cretaceous (Albian) locality of Pietraroia, Italy, has yielded a rich and diverse assemblage of fossil vertebrates, including at least one genus of rhynchocephalian (Derasmosaurus) and three named lizards (Chometokadmon, Costasaurus and Eichstaettisaurus).
S. E. Evans, RAIA, PASQUALE, C. Barbera
openaire   +3 more sources

Lower Cretaceous nautiloids from Texas

1953
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +1 more source

Central Texas Lower Cretaceous Stratigraphy: ABSTRACT

AAPG Bulletin, 1962
The Trinity Group is divided into a lower unit consisting of the terrigenous Hosston Formation overlain by the carbonate Sligo; a middle unit called the Pearsall, made up of the Hammett shale, Cow Creek limestone: and Bexar shale; and an upper unit which includes the Hensel sand, overlain by the Glen Rose limestone. Limestone, dolomite, and marl of the
openaire   +1 more source

Reconstruction of a Lower Cretaceous conifer

Botanical Journal of the Linnean Society, 1983
Remains of Pseudofrenelopsis parceramosa (Fontaine) Watson (Cheirolepidiaceae) from the Wealden of the Isle of Wight have been examined from the point of view of the branching and mode of growth of the plant. Evidence is presented that the tree exhibited seasonal growth and that the young extension shoots bore numerous temporary ultimate branch?
openaire   +1 more source

Microplankton from Australian Lower Cretaceous sediments

1960
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Eisenack, Alfred, Cookson, Isabel Clifton   +1 more
openaire   +1 more source