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Issues
Volume 83, Number 7
July 1972

ISSN 0016-7606
EISSN 1943-2674
Geophysical Studies in the Angola Diapir Field
GSA Bulletin July 01, 1972, Vol.83, 1901-1910. doi:https://doi.org/10.1130/0016-7606(1972)83[1901:GSITAD]2.0.CO;2
Pliocene Uplift of the Grand Canyon Region—Time of Drainage Adjustment
GSA Bulletin July 01, 1972, Vol.83, 1923-1932. doi:https://doi.org/10.1130/0016-7606(1972)83[1923:PUOTGC]2.0.CO;2
Early History of the Colorado River in the Basin and Range Province
GSA Bulletin July 01, 1972, Vol.83, 1933-1948. doi:https://doi.org/10.1130/0016-7606(1972)83[1933:EHOTCR]2.0.CO;2
Fission-Track Age Bearing on the Permian-Triassic Boundary and Time of the Sonoma Orogeny in North-Central Nevada
GSA Bulletin July 01, 1972, Vol.83, 1949-1952. doi:https://doi.org/10.1130/0016-7606(1972)83[1949:FABOTP]2.0.CO;2
Staurolite Zone Caradoc (Middle-Late Ordovician) Age, Old World Province Brachiopods from Penobscot Bay, Maine
GSA Bulletin July 01, 1972, Vol.83, 1953-1960. doi:https://doi.org/10.1130/0016-7606(1972)83[1953:SZCMOA]2.0.CO;2
Morphology and Petrography of Volcanic Ashes
GSA Bulletin July 01, 1972, Vol.83, 1961-1988. doi:https://doi.org/10.1130/0016-7606(1972)83[1961:MAPOVA]2.0.CO;2
Evolution of the Cordilleran Fold Belt
GSA Bulletin July 01, 1972, Vol.83, 1989-2004. doi:https://doi.org/10.1130/0016-7606(1972)83[1989:EOTCFB]2.0.CO;2
Metamorphic Chronology of the Limpopo Belt, Southern Africa
GSA Bulletin July 01, 1972, Vol.83, 2005-2018. doi:https://doi.org/10.1130/0016-7606(1972)83[2005:MCOTLB]2.0.CO;2
Observations on the Numerical Determination of Axes of Cylindrical and Conical Folds
GSA Bulletin July 01, 1972, Vol.83, 2019-2024. doi:https://doi.org/10.1130/0016-7606(1972)83[2019:OOTNDO]2.0.CO;2
Strain Calculated from Twinning in Calcite
GSA Bulletin July 01, 1972, Vol.83, 2025-2038. doi:https://doi.org/10.1130/0016-7606(1972)83[2025:SCFTIC]2.0.CO;2
Sediment Redistribution on the Reykjanes Ridge: Seismic Evidence
GSA Bulletin July 01, 1972, Vol.83, 2039-2062. doi:https://doi.org/10.1130/0016-7606(1972)83[2039:SROTRR]2.0.CO;2
Paleomagnetism and Potassium-Argon Ages of the Sonoma Volcanics, California
GSA Bulletin July 01, 1972, Vol.83, 2063-2072. doi:https://doi.org/10.1130/0016-7606(1972)83[2063:PAPAOT]2.0.CO;2
Geomorphic Evidence for Late-Wisconsin and Holocene Tectonic Deformation, Death Valley, California
GSA Bulletin July 01, 1972, Vol.83, 2073-2098. doi:https://doi.org/10.1130/0016-7606(1972)83[2073:GEFLAH]2.0.CO;2
Major Heavy Mineral Assemblages and Heavy Mineral Provinces of the Central California Coast Region
GSA Bulletin July 01, 1972, Vol.83, 2099-2104. doi:https://doi.org/10.1130/0016-7606(1972)83[2099:MHMAAH]2.0.CO;2
Geosynclines in the New Global Tectonics
GSA Bulletin July 01, 1972, Vol.83, 2105-2110. doi:https://doi.org/10.1130/0016-7606(1972)83[2105:GITNGT]2.0.CO;2
Potassium-Rich Alkaline Intrusive Rocks of Western Alaska
GSA Bulletin July 01, 1972, Vol.83, 2111-2128. doi:https://doi.org/10.1130/0016-7606(1972)83[2111:PAIROW]2.0.CO;2
Petrology and Mineralization of a Molybdenum-Bearing Alkalic Stock, Sierra Blanca, New Mexico
GSA Bulletin July 01, 1972, Vol.83, 2129-2148. doi:https://doi.org/10.1130/0016-7606(1972)83[2129:PAMOAM]2.0.CO;2
Tectonic Dewatering and Strain in the Michigamme Slate, Michigan
GSA Bulletin July 01, 1972, Vol.83, 2149-2158. doi:https://doi.org/10.1130/0016-7606(1972)83[2149:TDASIT]2.0.CO;2
Mechanisms of Clast Attrition in Basal Till
GSA Bulletin July 01, 1972, Vol.83, 2159-2166. doi:https://doi.org/10.1130/0016-7606(1972)83[2159:MOCAIB]2.0.CO;2
Stratigraphy and Petrology of the Lower Eocene Willwood Formation, Bighorn Basin, Wyoming
GSA Bulletin July 01, 1972, Vol.83, 2167-2180. doi:https://doi.org/10.1130/0016-7606(1972)83[2167:SAPOTL]2.0.CO;2
Significant Multiple Pre-Illinoian Till Exposure in Southeastern Indiana
GSA Bulletin July 01, 1972, Vol.83, 2181-2187. doi:https://doi.org/10.1130/0016-7606(1972)83[2181:SMPTEI]2.0.CO;2
Pleistocene Drainage Development in North Dakota
GSA Bulletin July 01, 1972, Vol.83, 2189-2193. doi:https://doi.org/10.1130/0016-7606(1972)83[2189:PDDIND]2.0.CO;2
Experimental Studies on the Formation of Lunar Surface Features by Fluidization: Discussion
GSA Bulletin July 01, 1972, Vol.83, 2195-2196. doi:https://doi.org/10.1130/0016-7606(1972)83[2195:ESOTFO]2.0.CO;2
Experimental Studies on the Formation of Lunar Surface Features by Fluidization: Reply
GSA Bulletin July 01, 1972, Vol.83, 2197-2199. doi:https://doi.org/10.1130/0016-7606(1972)83[2197:ESOTFO]2.0.CO;2
Faunal Extinctions and Reversals of the Earth's Magnetic Field: Discussion
GSA Bulletin July 01, 1972, Vol.83, 2211-2214. doi:https://doi.org/10.1130/0016-7606(1972)83[2211:FEAROT]2.0.CO;2
Faunal Extinctions and Reversals of the Earth's Magnetic Field: Reply
GSA Bulletin July 01, 1972, Vol.83, 2215-2216. doi:https://doi.org/10.1130/0016-7606(1972)83[2215:FEAROT]2.0.CO;2
Age and Correlation of the Eocene Ulatisian and Narizian Stages, California: Discussion
GSA Bulletin July 01, 1972, Vol.83, 2217-2223. doi:https://doi.org/10.1130/0016-7606(1972)83[2217:AACOTE]2.0.CO;2
Age and Correlation of the Ulatisian and Narizian Stages, California: Reply
GSA Bulletin July 01, 1972, Vol.83, 2225-2232. doi:https://doi.org/10.1130/0016-7606(1972)83[2225:AACOTE]2.0.CO;2