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pro vyhledávání: '"Robert R. Shrock"'
Autor:
Robert R. Shrock
Publikováno v:
Journal of Geological Education. 42:92-92
Autor:
Robert R. Shrock
Publikováno v:
Geological Society of America Bulletin. 50:529-562
The Silurian of Wisconsin contains biohermal structures at several stratigraphic horizons. These bioherms are essentially cuboidal, domal, or ridgelike masses of porous and cavernous, crudely bedded and poorly jointed, barren to highly fossiliferous
Publikováno v:
Science. 111:700-703
Autor:
Robert R. Shrock, Edgar R. Cumings
Publikováno v:
Geological Society of America Bulletin. 39:579-620
Introduction Within the years 1837 and 1839 Darwin read his first paper on the coral islands of the Pacific, and Murchison published the Silurian System, in which he described, under the name of “ballstones,” the reefs of the Wenlock. In 1847 Mur
Autor:
Robert R. Shrock
Publikováno v:
The Journal of Geology. 37:17-29
The Wabash sluiceway between Huntington and Peru is characterized by numerous moundlike rocky hills which are composed of the unreduced portions of Niagaran coral and stromatoporoid reefs. Hills of a similar character on the Island of Gotland are cal
Autor:
Robert R. Shrock, Clyde A. Malott
Publikováno v:
The Journal of Geology. 41:337-370
In the southern part of Newton County, in the northwestern part of Indiana, strata of Middle Ordovician (St. Peter, Black River, Galena) age are exposed at the surface, surrounded on all sides, so far as is known, at lower elevations by younger strat
Autor:
Clyde Arnett Malott, Robert R. Shrock
Publikováno v:
American Journal of Science. :257-273
Autor:
Robert R. Shrock
Publikováno v:
The Journal of Geology. 56:118-129
A simple field and laboratory classification of sedimentary rocks is proposed. It is based fundamentally on composition and texture, with the primary divisions determined by the mode of origin of the constituents. Tt is tripartite in nature, consisti
Autor:
C. E. Decker, W. F. Prouty, A. F. Foerste, Frank McKim Swartz, Charles Butts, Charles K. Swartz, G. M. Ehlers, W. H. Twenhofel, M. Y. Williams, G. H. Chadwick, T. Gillette, F. J. Alcock, S. A. Northrop, Edwin Kirk, E. M. Kindle, Robert R. Shrock, T. E. Savage, E. R. Cumings
Publikováno v:
Geological Society of America Bulletin. 53:533-538
INTRODUCTION This is Number 3 of a series of correlation charts prepared under the auspices of the Committee of Stratigraphy of the National Research Council (Dunbar, 1942, p. 429–434). It was compiled by a subcommittee on the Silurian system. Each
Autor:
Robert R. Shrock
Publikováno v:
Science (New York, N.Y.). 87(2263)