Results 51 to 60 of about 7,153,299 (305)

Lower Cretaceous rocks of Sierra Los Chinos, east-central Sonora, Mexico [PDF]

open access: yesGeofísica Internacional, 2000
Most Lower Cretaceous rocks in Sonora are part of the Bisbee Group of southern Arizona, deposited within a basin considered to be an extension of the Gulf of Mexico into Texas, New Mexico, Arizona and Sonora.
José F. Longoria, Rogelio Monreal
doaj  

Osteology and relationships of Rhinopycnodus gabriellae gen. et sp. nov. (Pycnodontiformes) from the marine Late Cretaceous of Lebanon [PDF]

open access: yes, 2013
The osteology of Rhinopycnodus gabriellae gen. and sp. nov., a pycnodontiform fish from the marine Cenomanian (Late Cretaceous) of Lebanon, is studied in detail.
Capasso, Luigi, Taverne, Louis
core   +3 more sources

The Dinosaurian Ichnofauna of the Lower Cretaceous (Valanginian-Barremian) Broome Sandstone of the Walmadany Area (James Price Point), Dampier Peninsula, Western Australia

open access: yesJournal of Vertebrate Paleontology, 2016
Extensive and well-preserved tracksites in the coastally exposed Lower Cretaceous (Valanginian-Barremian) Broome Sandstone of the Dampier Peninsula provide almost the entire fossil record of dinosaurs from the western half of the Australian continent ...
S. Salisbury   +4 more
semanticscholar   +1 more source

Late Barremian-Early Aptian Ammonites from the Tirgan Formation, Kopet-Dagh Sedimentary Basin, NE Iran [PDF]

open access: yesJournal of Sciences, Islamic Republic of Iran, 2019
During the recent field research on the Tirgan Formation in the west of Kopet-Dagh sedimentary basin, ammonite assemblages were obtained from the carbonate strata of this formation. This new finding is important for stratigraphical purpose.
Morteza Taherpour Khalil Abad   +3 more
doaj   +1 more source

Nikolay Ivanovitch Karakash - an outstanding scientist-naturalist

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2015
The 2016 year is a year of the 100th anniversary of the death of the outstanding Russian geologist and paleontologist, one of the first investigators of Cretaceous deposits of Crimea and Caucasus, Nikolay Ivanovitch Karakash.
V. N. Komarov
doaj   +1 more source

The oldest known snakes from the Middle Jurassic-Lower Cretaceous provide insights on snake evolution

open access: yesNature Communications, 2015
The previous oldest known fossil snakes date from ~100 million year old sediments (Upper Cretaceous) and are both morphologically and phylogenetically diverse, indicating that snakes underwent a much earlier origin and adaptive radiation.
M. Caldwell   +3 more
semanticscholar   +1 more source

Study on the Early Cretaceous fluvial-desert sedimentary paleogeography in the Northwest of Ordos Basin

open access: yesOpen Geosciences, 2023
Early Cretaceous desert sedimentary system was developed in Northwest Ordos Basin. At present, the research degree of desert sedimentary paleogeography is low.
Feng Yangwei   +5 more
doaj   +1 more source

Macroevolutionary patterns in cranial and lower jaw shape of ceratopsian dinosaurs (dinosauria, ornithischia). phylogeny, morphological integration, and evolutionary rates [PDF]

open access: yes, 2017
Organisms: Ceratopsians were herbivorous, beaked dinosaurs, ranging from 1 m to 9 m in body length, usually four-footed, and with a bony frill that extended backwards from the cranium over the nape of the neck. Known from Asia, Europe, and North America,
Farke, Aa   +3 more
core  

Petrological and Geochemical Constraints on the Origin of Early Cretaceous Volcanic Rocks in the Central‐East Asia: Implications for Crustal Growth and Evolution

open access: yesGeochemistry, Geophysics, Geosystems, 2018
New petrological and geochemical data for Early Cretaceous volcanic rocks in the North China Craton (NCC) combined with published data of cotemporaneous volcanic rocks in the NCC and eastern Central Asian Orogenic Belt (ECAOB) are used to understand ...
Sheng‐Ping Qian   +7 more
doaj   +1 more source

Provenance reconstructions. Article 1. Mineralogical and petrographic approaches and methods

open access: yesЛитосфера, 2020
Research subject. This is the first in the series of four articles, which aims to review existing provenance reconstruction tools.Methods and materials.
A. V. Maslov   +3 more
doaj   +1 more source

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