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2. Abandonment of the name Hartford Hill rhyolite tuff and adoption of new formation names for middle Tertiary ash-flow tuffs in the Carson City - Silver City area, Nevada
3. Abandonment of the name Hartford Hill rhyolite tuff and adoption of new formation names for middle Tertiary ash-flow tuffs in the Carson City - Silver City area, Nevada
4. Abriss der Geologie
5. The Accotink schist, Lake Barcroft metasandstone, and Popes Head Formation--keys to an understanding of the tectonic evolution of the northern Virginia Piedmont
6. The Accotink schist, Lake Barcroft metasandstone, and Popes Head Formation--keys to an understanding of the tectonic evolution of the northern Virginia Piedmont
7. Additions to the flora of the Wilcox group
8. After a century : revised Paleogene coal stratigraphy, correlation, and deposition, Powder River Basin, Wyoming and Montana
9. After the Australopithecines : stratigraphy, ecology, and culture change in the Middle Pleistocene
10. After the Australopithecines : stratigraphy, ecology, and culture change in the Middle Pleistocene
11. Age and correlation of California Paleogene benthic foraminiferal stages
12. Age and correlation of California Paleogene benthic foraminiferal stages
13. Age and correlation of Cretaceous rocks previously assigned to the Morrison(?) Formation, Sanpete-Sevier Valley area, central Utah
14. Age and correlation of the Chattanooga Shale and the Maury Formation
15. Age and correlation of the Chattanooga shale and the Maury formation
16. Age and correlation of the Clinchfield Sand in Georgia
17. Age and correlation of the Clinchfield Sand in Georgia
18. Age and origin of stone quarried near Fort Wayne in the mid-1800's
19. Age and structural significance of ophiolite and adjoining rocks in the upper Chulitna district, south-central Alaska
20. Age and structural significance of ophiolite and adjoining rocks in the upper Chulitna district, south-central Alaska
21. Age and tectonic significance of volcanic rocks in the northern Los Angeles basin, California
22. Age and tectonic significance of volcanic rocks in the northern Los Angeles Basin, California
23. Age determination of young rocks and artifacts : physical and chemical clocks in Quaternary geology and archaeology
24. The age of Pithecanthropus
25. Age of tephra beds at the Ocean Point dinosaur locality, North Slope, Alaska, based on K-Ar and ⁴⁰Ar/³⁹Ar analyses
26. Age of tephra beds at the Ocean Point dinosaur locality, North Slope, Alaska, based on K-Ar and ⁴⁰Ar/³⁹Ar analyses
27. Age of the Coso Formation, Inyo County, California
28. Age of the Detroit River formation in Indiana
29. Age of the Lospe Formation (Early Miocene) and origin of the Santa Maria Basin, California
30. Age of the Lospe Formation (Early Miocene) and origin of the Santa Maria Basin, California
31. Age relations between soils and geology in the coastal plain of Maryland and Virginia
32. Age relations in high-grade metamorphic terrains
33. The Ajo Mining District, Pima County, Arizona : evidence for Middle Cenozoic detachment faulting, plutonism, volcanism, and hydrothermal alteration
34. Alkalic rocks and Carboniferous sandstones, Ouachita Mountains : new perspectives
35. Alkalic rocks of Iron Hill, Gunnison County, Colorado
36. Alkalic rocks of Iron Hill, Gunnison County, Colorado
37. Allophaiomys and the age of the Olyor Suite, Krestovka sections, Yakutia
38. Allostratigraphy of the U.S. Middle Atlantic continental margin--characteristics, distribution, and depositional history of principal unconformity-bounded Upper Cretaceous and Cenozoic sedimentary units
39. Allostratigraphy of the U.S. Middle Atlantic continental margin--characteristics, distribution, and depositional history of principal unconformity-bounded Upper Cretaceous and Cenozoic sedimentary units
40. Alpine and Mediterranean Quaternary
41. Alsea Formation -- an Oligocene marine sedimentary sequence in the Oregon Coast Range
42. Alsea Formation, an Oligocene marine sedimentary sequence in the Oregon Coast Range
43. Alteration and geochemistry of Tertiary volcanic rocks in parts of the Virginia City quadrangle, Nevada
44. Alteration and geochemistry of Tertiary volcanic rocks in parts of the Virginia City quadrangle, Nevada
45. Altered earth : getting the anthropocene right
46. Amazon Expeditions : My Quest for the Ice-Age Equator
47. Amazon expeditions : my quest for the ice-age equator
48. Amazonia--landscape and species evolution : a look into the past
49. The American Upper Ordovician standard: VII. : Stratigraphy and petrology of the Cynthiana and Eden formations of the Ohio Valley
50. Ammonites and some characteristic bivalves from the Upper Cretaceous Frontier Formation, Natrona County, Wyoming
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