Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Douglas J. Nichols"'
Autor:
Douglas J. Nichols, Kirk R. Johnson
In this text, two of the world's leading experts in palynology and paleobotany provide a comprehensive account of the fate of land plants during the'great extinction'about 65 million years ago. They describe how the time boundary between the Cretaceo
Publikováno v:
Palynology. 34:157-163
Thermally altered and carbonised palynomorphs from the Omichidani Formation in the Tetori area of west-central Japan are poorly preserved but identifiable at the genus level. They include fern spores and gymnosperm pollen, and pollen of the angiosper
Autor:
Douglas J. Nichols
Publikováno v:
Palaeogeography, Palaeoclimatology, Palaeoecology. 255:22-34
Terrestrial or nonmarine rocks of western North America preserve a record of major disruption and permanent alteration of plant communities precisely at the K–T boundary — in the same rocks that preserve geochemical and mineralogical evidence of
Autor:
James R. Garrison, Donald B. Brinkman, Douglas J. Nichols, Paul W. Layer, Donald Burge, Denise Thayn
Publikováno v:
Cretaceous Research. 28:461-494
A quarry within the Cedar Mountain Formation in Mussentuchit Wash, Emery County, Utah, produced a fossil assemblage containing the remains of at least eight juvenile iguanodontid dinosaurs (Eolambia caroljonesa). The Cedar Mountain Formation lies str
Autor:
Douglas J. Nichols, Henry L. Ott
Publikováno v:
Palynology. 30:33-41
Autor:
Douglas J. Nichols, Masaki Matsukawa, Martin G. Lockley, Makoto Ito, Naohisa Nishida, Kazuto Koarai
Publikováno v:
Cretaceous Research. 27:199-225
Cretaceous nonmarine deposits are widely distributed on the Asian continent and include various kinds of zoo- and phyto-assemblages. The Tetori Group is one of the most important Mesozoic terrestrial deposits in East Asia, and for this reason its geo
Autor:
Martin G. Lockley, Ken'ichi Saiki, Makoto Ito, Masaki Matsukawa, Ikuwo Obata, Kenichiro Shibata, Reiji Kukihara, Douglas J. Nichols
Publikováno v:
Cretaceous Research. 27:285-307
In recent years, there has been global interest in the environments and ecosystems around the world. It is helpful to reconstruct past environments and ecosystems to help understand them in the present and the future. The present environments and eco
Publikováno v:
Cretaceous Research. 27:241-251
To provide biostratigraphic and paleoecologic data for a major international project studying dinosaur trackways in eastern Asia, samples were collected for palynological analysis from the Choyr Basin of southeastern Mongolia and the Yanji Basin, Jil
Autor:
Henry L. Ott, Douglas J. Nichols
Publikováno v:
Palynology. 30:33-41
Neotypes are designated herein for certain Paleocene species of juglandaceous pollen that were originally described in 1978. The microscope slides bearing the holotypes have been lost, eliminating the possibility of designating lectotypes and necessi
Autor:
Douglas J. Nichols, R. Farley Fleming
Publikováno v:
Rocky Mountain Geology. 37:135-163
Palynological analysis provides data for determinations of ages and paleoenvironments of Maastrichtian, Paleocene, and Eocene strata in the Denver Basin. These strata were sampled on the surface at natural and artificial outcrops (construction sites)