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Map showing paleontological control of Paleozoic stratigraphy in New England Map showing paleontological control of Paleozoic stratigraphy in New England
Assignment of Phanerozoic stratigraphic units to their proper place in the geologica time scale is based primarily on paleontology. Radiometric methods are becoming increasingly important (Naylor, 1976), particularly where paleontological data are lacking. This map and text are concerned only with the paleontological data bearing on the Paleozoic stratigraphy of New England.
Map showing reconnaissance geochemistry in the gold-pyrophyllite belt of northwestern Moore County, North Carolina Map showing reconnaissance geochemistry in the gold-pyrophyllite belt of northwestern Moore County, North Carolina
Traces of gold and molybdenum are widely disseminated in an area approximately 35 km long and 10 km wide in northwestern Moore County, N.C. At least 2540 oz. of gold were recovered from 16 or more mines and prospects between 1880 and 1910. One hundred and ninety rock samples out of 244 collected from old gold mines, pyrophyllite deposits and along roads contain gold quantities ranging...
Map showing the oxygen isotope composition of granitoid rocks of the Basin-Range province Map showing the oxygen isotope composition of granitoid rocks of the Basin-Range province
This map presents oxygen suite of granitoid rocks from Province of Nevada, Utah, isotope data for a the Basin and Range California, and Arizona. Two random samples were collected each of two randomly selected plutons within 1° x 1° area. For this study, only the m.nnbered sample was analyzed except in instance when sample GR-128 was substituted its odd-numbered counterpart (CR-127)...