Geology and Oil Resources of the West Border of the San Joaquin Valley North of Coalinga, CaliforniaU.S. Government Printing Office, 1915 - 220 Seiten |
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acid adit alkalinity Alum Bluff formation analyses anticline artesian circulation beds bowlders calcite calcium Cambrian and Ordovician Cantua carbon dioxide cent chalcopyrite Chattanooga shale Chloride Ciervo clay shale Coalinga Coalinga district containing copper Cretaceous deposits depth Diablo Range dolomite Ellamar district Eocene fault feet fold formed fossils geologic graywackes greenstone hills hydrogen sulphide iron jasperoid Joplin region Kreyenhagen shale lead and zinc limestone lower mapped Martinez metals miles mineral mines Miocene Mississippian Missouri Moreno formation occur Ordovician origin outcrop overlying oxidation Ozark Panoche Creek Panoche formation pebbles Pennsylvanian shale petroleum places Prince William Sound probably pyrite pyrrhotite quantity quartz reacting solids rock phosphate salinity San Joaquin Valley sandstone sandy sediments shear zone slates solution sphalerite Spring strata sulphate surface Survey Bull Tejon formation Tertiary thickness tion Trace U. S. Geol unconformity uplift upper Valdez Vallecitos Vaqueros Vaqueros formation
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Seite 8 - ... beneath the surface in the peninsula of Florida. However, the upper part of the limestones of the peninsula include a slight admixture of land-derived sediments, such as clay and fine sand, and well records indicate that similar conditions exist in western Florida. Layers of light-blue or gray chert, ranging in thickness from a fraction of an inch to several feet, occur in the limestones of this group. Irregular masses and bowlders of flint are found at many places where the rocks belonging to...
Seite 12 - Bull. 309, 1907. Arnold, Ralph, and Anderson, Robert, Preliminary report on the Santa Maria oil district, Santa Barbara County, Cal.
Seite 197 - ... from late Mesozoic rocks. In Ventura County, Cal., the principal oil-yielding formations are classed as Tertiary and range in age from Miocene to Pliocene. Along the west side of the San Joaquin Valley the range is greater, the oil extending downward into the upper members of the Cretaceous system. In the Kern River field, on the east side of the San Joaquin Valley in Kern County, oil is obtained from rocks of late Miocene or Pliocene age. In Santa Barbara County the oil is derived chiefly from...
Seite 46 - ... loss of carbonic acid. The latter would happen whenever the acid was required for the solution of additional carbonate of lime, or when, through aeration, it should escape from the water. The zone of phosphate deposition was...
Seite 175 - Vaqueros contains beds of hard sandstone that may easily be traced along their outcrops, because they form the first high ridge parallel with The Vallecitos on its north side. The formation is 700...
Seite 15 - Coquina" rock 330 -331 Clay 331 -340 Blue clay and sand 340 -350 Sticky blue clay; very little sand 350 -358 Clay with black gravel 358 -365 Blue clay with gravel and shell casts 365 -368 White clay with gravel 368 -375 White marl with very little sand 375 -385 Light-colored clay 385 -390 Greenish clay 390 -400 Greenish sandy clay 400 -410 Sticky clay 410 -428 Clay with very little sand 428...
Seite 176 - ... valley and varies between 5° and 30°. The structure is not of the most favorable type for the accumulation of oil, and yet it is such that a certain amount of oil would be expected to accumulate if any existed in the beds. The shale of the Vaqueros lies unconformably upon the Kreyenhagen shale, as in the Coalinga field, and if oil were present in the shale it should rise and collect in the sandy strata overlying its truncated edges, making itself apparent at the outcrop.
Seite 15 - Sand containing shells; just enough clay to hold them 314 -320 Shells with scraps of fossil bone :.... 320 -330 "Coquina" rock 330 -331 Clay 331 -340 Blue clay and sand 340 -350 Sticky blue clay; very little sand 350 -358 Clay with black gravel 358 -365 Blue clay with gravel and shell casts 365 -368 White clay with gravel 368...
Seite 180 - There can be no doubt that a large amount has been lost by dissemination through the beds and escape at the surface, as is attested by the prevalence of the oil discoloration throughout the formation. But it is an important fact that thick lenticular beds of porous, fine-grained sand which ought to be good reservoirs are included in the shale, and it is highly probable that much oil has been absorbed by these lenses and retained in them. The lenses are not confined to any particular part of the shale...
Seite 61 - They form, like the manganese nodules, around various nuclei, but preferably upon organic centers, such as shells. In many cases the phosphatic matter, was first deposited in cavities of shells, around which the nodules continued to grow, inclosing various muddy impurities. Probably the ammoniacal...