Report on the United States and Mexican Boundary Survey: Made Under the Direction of the Secretary of the Interior, 1권,파트 2C. Wendell, printer, 1857 |
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104 페이지
... Nebraska and at other places ; and although quite possible that both the trilobite and the coral have been derived from the extreme northern exposures of the older rocks , I am nevertheless prepared to expect that these formations will ...
... Nebraska and at other places ; and although quite possible that both the trilobite and the coral have been derived from the extreme northern exposures of the older rocks , I am nevertheless prepared to expect that these formations will ...
105 페이지
... Nebraska , are nevertheless insufficient to give the means of care- ful comparison and reliable conclusions . Our knowledge of the geological formations of the west is now so rapidly progressing , and the materials accumulating in such ...
... Nebraska , are nevertheless insufficient to give the means of care- ful comparison and reliable conclusions . Our knowledge of the geological formations of the west is now so rapidly progressing , and the materials accumulating in such ...
106 페이지
... Nebraska ; and that the Tertiary is probably co - extensive with the cretaceous formation from Nebraska to Texas and New Mexico . 3 and 4. Argillaceous , buff - colored limestone , a thickness of fifty feet , ascertained in sinking a ...
... Nebraska ; and that the Tertiary is probably co - extensive with the cretaceous formation from Nebraska to Texas and New Mexico . 3 and 4. Argillaceous , buff - colored limestone , a thickness of fifty feet , ascertained in sinking a ...
114 페이지
... Nebraska . 7. Coarse sand and small pebbles cemented by calcareous matter , forming a conglomerate which has a thickness of 30 or 40 feet . 8. Fossil wood - an erratic mass found upon the plains . 9. Vesicular lava , having the cavities ...
... Nebraska . 7. Coarse sand and small pebbles cemented by calcareous matter , forming a conglomerate which has a thickness of 30 or 40 feet . 8. Fossil wood - an erratic mass found upon the plains . 9. Vesicular lava , having the cavities ...
123 페이지
... Nebraska and Kansas , an important limestone formation , and constantly increasing in a westerly direction until it becomes the prominent limestone of the Rocky Mountain range . According to the report of Captain Stansbury , and from ...
... Nebraska and Kansas , an important limestone formation , and constantly increasing in a westerly direction until it becomes the prominent limestone of the Rocky Mountain range . According to the report of Captain Stansbury , and from ...
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adjoining alluvial Ammonites basin beds belt bluffs Boundary Survey breccia calcareous cañon Caprina carbonate carboniferous limestone character clay coal measures coast collections color Colorado compact composed connexion containing copper Cordilleras course creek cretaceous cretaceous formation cretaceous fossils cretaceous strata crystalline deposits desert diluvial Eagle Pass El Paso elevation exhibit Exogyra exposures extensive feet feldspar feldspathic fossils Frémont frequently geological granite gravelly table-land green sand igneous rocks Inoceramus irregular Jersey lava lignite localities lower valve marked marl mass metamorphic rocks miles mineral Missouri mountain range mouth Nebraska numerous occur Ostrea Paso Pitcheri plain PLATE porphyritic portion present problematicus quartz region ribs ridge Rio Bravo river rocky Roemer San Pedro sandstone Santa shell side Sierra similar slope Sonoyta southwest species specimens springs strata stratified stream summit surface Tertiary formation TEXANA Texas texture thick umbo upper valley various vicinity volcanic