A Descriptive Catalog of Selected Aerial Photographs of Geologic Features in Areas Outside the United States PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download A Descriptive Catalog of Selected Aerial Photographs of Geologic Features in Areas Outside the United States PDF full book. Access full book title A Descriptive Catalog of Selected Aerial Photographs of Geologic Features in Areas Outside the United States by Geological Survey (U.S.). Download full books in PDF and EPUB format.
Author: Geological Survey (U.S.)
Publisher:
ISBN:
Category : Aerial photography in geology
Languages : en
Pages : 56
Get Book Here
Book Description
Author: Geological Survey (U.S.)
Publisher:
ISBN:
Category : Aerial photography in geology
Languages : en
Pages : 56
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 48
Get Book Here
Book Description
Author: Geological Survey (U.S.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 306
Get Book Here
Book Description
Author: J. Linsley Gressitt
Publisher: American Geophysical Union
ISBN:
Category : Science
Languages : en
Pages : 394
Get Book Here
Book Description
Published by the American Geophysical Union as part of the Antarctic Research Series, Volume 10. The existence of insects, mites, and their relatives on the antarctic continent is of great interest to many. These terrestrial arthropods may be said to be the dominant land animals in the absence of land vertebrates and many major groups of invertebrates. They are important in the simple food cycles which involve most segments of the land flora and microorganisms, and they play a part in soil formation. Thus a knowledge of their ecology is essential to the understanding of various biotic balances and processes. That several species live in the area of 85°S latitude in the face of harsh climatic factors is of great concern to the ecologist and the physiologist—therin lie many unanswered questions for future research.
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 500
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages :
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1020
Get Book Here
Book Description
Author: Merrill W. Foster
Publisher: American Geophysical Union
ISBN: 0875901220
Category : Science
Languages : en
Pages : 192
Get Book Here
Book Description
Published by the American Geophysical Union as part of the Antarctic Research Series, Volume 21. The Recent brachiopod faunas from southernmost South America, Antarctica, and the Subantarctic consisting of 21 genera and 37 species are described from new material. New taxa include the genera Manithyris and Bathynanus. Also new are 11 species: Compsothyris ballenyi, Hispanirhynchia? chiliensis, Manithyris rossi, Liothyrella multiporosa, Liothyrella scotti, Bathynanus tenuicostatus, Eucalathis macrorhynchus, Amphithyris hallettensis, Dallina eltanini, Fallax antarcticus, and Magellania? spinosa. Factor analysis was used to study relationships among morphological characters and environmental parameters. In Liothyrella, negative associations were found between beak height and water depth. The size of the pedicle opening within this genus is associated with the width of the hinge plate and the loop; apparently, these associations are related to increased dorsal adjustor muscle size with increased pedicle size. Similar relationships are found in the terebratellids, although here all of the characters are also negatively associated with water depth. Characters negatively associated with water depth may relate to the differing current strength at various depths. Puncta density is positively correlated with water temperature. Examples of brachiopod variation are discussed. Synonyms have resulted from former failure to study large samples and to appreciate the extent of brachiopod variation. A priori valuation of certain characters as being specific is unwarranted, since sibling species may be more similar than different subspecies of the same species. Many Recent and fossil brachiopod genera are too narrow in definition owing to oversplitting or to a narrow conception of monophyly. I advocate somewhat broader and more practical genera for obtaining the maximal information value from such taxa. Brachiopods, contrary to popular belief, are an abundant and viable group in the southern hemisphere faunas. Most brachiopods in the Ross Sea appear to have definite niches and habitats but may overlap geographically where population densities are low. Brachiopods here can be divided roughly into a slope and a shelf assemblage. The greatest species diversity occurs at the seaward edge of the Ross Sea shelf, interpreted as an ecotone effect where two different water types meet. Only South America and Antarctica appear to have or have had direct communication between some elements of their brachiopod faunas. Other similarities between separate southern continents are related to retention of common pre-Cenozoic elements or to chance dispersal of larvae across barriers. Events related to cooling during the late Pliocene or Pleistocene caused reduction of puncta density, shell thickness, and spiculation in the Recent fauna and apparently influenced the present species structure, at least in Liothyrella uva, Gyrothyris mawsoni, and Macandrevia.
Author:
Publisher:
ISBN:
Category : Meteorology
Languages : en
Pages : 100
Get Book Here
Book Description
Author: United States. Congress
Publisher:
ISBN:
Category : Law
Languages : en
Pages : 788
Get Book Here
Book Description
The Congressional Record is the official record of the proceedings and debates of the United States Congress. It is published daily when Congress is in session. The Congressional Record began publication in 1873. Debates for sessions prior to 1873 are recorded in The Debates and Proceedings in the Congress of the United States (1789-1824), the Register of Debates in Congress (1824-1837), and the Congressional Globe (1833-1873)
