Skip to content

Download PDF by J. L. Usher: Ammonite Faunas of the Upper Cretaceous Rocks of Vancouver

By J. L. Usher

Show description

Read Online or Download Ammonite Faunas of the Upper Cretaceous Rocks of Vancouver Island, British Columbia PDF

Best biology books

Read e-book online Biology of Chrysomelidae PDF

As in such a lot teams of bugs, clinical examine at the Chrysomelidae all started in Europe in 1758, with the outline of some genera and species by means of the Scandinavian entomologists C. von Linne, I. C. Fabricius, and others. because the nineteenth century dawned, many systematic entomologists took up the research of chrysomelid beetles, including different teams of beetles, and plenty of new species and genera have been defined from all components of the realm.

Download e-book for kindle: Methods in cell biology / Vol. 46, Cell death / edited by by Lawrence M Schwartz; Barbara A Osborne; American Society for

Mobilephone loss of life offers a present and complete selection of tools for the research of telephone demise. utilizing a various diversity of technical techniques and version platforms, the chapters during this quantity hide subject matters from the mobile and organismal to the molecular and anatomical. within the culture of this long-standing sequence, this volume's straight forward recipes and greater than a hundred tables and figures make the examine of cellphone demise obtainable throughout lifestyles technological know-how disciplines.

Extra info for Ammonite Faunas of the Upper Cretaceous Rocks of Vancouver Island, British Columbia

Example text

Pseudo-galtinum Y o k o y a m a from ' U p p e r Senonian' rocks of Japan. T h e Cedar District-Trent R i v e r fauna has considerable in c o m m o n with that of the Haslam faunizone, and for this reason the t w o faunizones are considered t o be y o u n g e r and older parts of the same stage. It has already been pointed o u t h o w certain elements in the Haslam faunizone suggest that it might b e Santonian rather than C a m p a n i a n , b u t in v i e w of the share that several species exercise in b o t h faunizones, and the pre­ sence in the higher Cedar District-Trent R i v e r zone of such forms as Hoplitoplacenticeras vancouverense, Ptychoceras vancouverense, Schluteria selwyniana, and Pachydiscus cf.

T o s o m e extent the, migratory process was repeated b y the m o v e m e n t northward of Baculites in N o r t h u m b e r l a n d - L a m b e r t time; (4) that, in reality, stratigraphically equivalent formations have few species in c o m m o n . , Schluteria selwyniana, and Baculites chicoensis, are found in b o t h basins. E. W. A. LANCE LENNEP sandstone sandstone PIERRE CEDAR DISTRICT TRENT RIVER PROTECTION COMOX BLOOD RESERVE QUALICUM BEARPAW FOREMOST FOREMOST LEA PARK EQUIVALENTS ALBERTA GROUP BENTON The chart is not to scale with respect to either time or thickness of Forma­ tions.

Cross­ b e d d e d layers and lenses of sandstone are interbedded with, and b e c o m e more plentiful toward the t o p of, this m e m b e r to where it passes u p w a r d i n t o the overlying interbedded sandstone a n d c o n g l o m e r a t e zone. T h e strata in the youngest m e m b e r , and particularly the conglomerate beds, are finer grained than those immediately b e l o w , although the sandstones m u c h resemble those t o w a r d the base of the formation. Fossil belemnoids have been reported b y R i c h a r d s o n and W h i t e a v e s from the lowest sandstone m e m b e r of the formation.

Download PDF sample

Ammonite Faunas of the Upper Cretaceous Rocks of Vancouver Island, British Columbia by J. L. Usher


by James
4.4

Rated 4.06 of 5 – based on 15 votes