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Issues
Volume 80, Number 7
July 1969

ISSN 0016-7606
EISSN 1943-2674
Ponded Sediments of the Mid-Atlantic Ridge between 22° and 23° North Latitude
GSA Bulletin July 01, 1969, Vol.80, 1163-1190. doi:https://doi.org/10.1130/0016-7606(1969)80[1163:PSOTMR]2.0.CO;2
Volcanic Substructure Inferred from Dredge Samples and Ocean-Bottom Photographs, Hawaii
GSA Bulletin July 01, 1969, Vol.80, 1191-1202. doi:https://doi.org/10.1130/0016-7606(1969)80[1191:VSIFDS]2.0.CO;2
Bathymetry and Marine Geology of the Andaman Basin, and Tectonic Implications for Southeast Asia
GSA Bulletin July 01, 1969, Vol.80, 1203-1230. doi:https://doi.org/10.1130/0016-7606(1969)80[1203:BAMGOT]2.0.CO;2
Principal Stress Directions from Plastic Flow in Crystals
GSA Bulletin July 01, 1969, Vol.80, 1231-1264. doi:https://doi.org/10.1130/0016-7606(1969)80[1231:PSDFPF]2.0.CO;2
Errors in Using Modern Stream-Load Data To Estimate Natural Rates of Denudation
GSA Bulletin July 01, 1969, Vol.80, 1265-1274. doi:https://doi.org/10.1130/0016-7606(1969)80[1265:EIUMSD]2.0.CO;2
Age and Position of Lower Devonian Graptolite Zones Relative to the Appalachian Standard Succession
GSA Bulletin July 01, 1969, Vol.80, 1275-1282. doi:https://doi.org/10.1130/0016-7606(1969)80[1275:AAPOLD]2.0.CO;2
Petrology of the Volcanic Rocks of Saint Helena Island, South Atlantic
GSA Bulletin July 01, 1969, Vol.80, 1283-1310. doi:https://doi.org/10.1130/0016-7606(1969)80[1283:POTVRO]2.0.CO;2
SA Microfabric Study of Calcite, Dolomite, and Quartz around Papoose Flat Pluton, California
GSA Bulletin July 01, 1969, Vol.80, 1311-1328. doi:https://doi.org/10.1130/0016-7606(1969)80[1311:SMSOCD]2.0.CO;2
Structural Evolution of the Southwestern Tobacco Root Mountains, Montana
GSA Bulletin July 01, 1969, Vol.80, 1329-1342. doi:https://doi.org/10.1130/0016-7606(1969)80[1329:SEOTST]2.0.CO;2
Alkalic and Tholeiitic Basaltic Volcanism Related to the Rio Grande Depression, Southern Colorado and Northern New Mexico
GSA Bulletin July 01, 1969, Vol.80, 1343-1354. doi:https://doi.org/10.1130/0016-7606(1969)80[1343:AATBVR]2.0.CO;2
Prehnite Veins in Triassic Diabase, Coopersburg, Pennsylvania
GSA Bulletin July 01, 1969, Vol.80, 1355-1362. doi:https://doi.org/10.1130/0016-7606(1969)80[1355:PVITDC]2.0.CO;2
Possible Seismicity of the Nacimiento Fault, California
GSA Bulletin July 01, 1969, Vol.80, 1363-1366. doi:https://doi.org/10.1130/0016-7606(1969)80[1363:PSOTNF]2.0.CO;2
Richat and Semsiyat Domes (Mauritania): Not Astroblemes
GSA Bulletin July 01, 1969, Vol.80, 1367-1372. doi:https://doi.org/10.1130/0016-7606(1969)80[1367:RASDMN]2.0.CO;2
Ultramafic and Basaltic Rocks Dredged from the Nearshore Flank of the Tonga Trench
GSA Bulletin July 01, 1969, Vol.80, 1373-1378. doi:https://doi.org/10.1130/0016-7606(1969)80[1373:UABRDF]2.0.CO;2
The Relationship between Falling Base Level and Lateral Erosion in Experimental Streams
GSA Bulletin July 01, 1969, Vol.80, 1379-1384. doi:https://doi.org/10.1130/0016-7606(1969)80[1379:TRBFBL]2.0.CO;2
A Rapid Field Method for Making Peels of Unconsolidated Sands
GSA Bulletin July 01, 1969, Vol.80, 1385-1386. doi:https://doi.org/10.1130/0016-7606(1969)80[1385:ARFMFM]2.0.CO;2
Profiles of Magnetic Anomalies South of the Aleutian Island Arc
GSA Bulletin July 01, 1969, Vol.80, 1387-1390. doi:https://doi.org/10.1130/0016-7606(1969)80[1387:POMASO]2.0.CO;2
Algal Boring: A Possible Depth Indicator in Carbonate Rocks and Sediments
GSA Bulletin July 01, 1969, Vol.80, 1391-1396. doi:https://doi.org/10.1130/0016-7606(1969)80[1391:ABAPDI]2.0.CO;2
Ultrastructure in Palmatolepis sp. and Polygnathus sp
GSA Bulletin July 01, 1969, Vol.80, 1397-1400. doi:https://doi.org/10.1130/0016-7606(1969)80[1397:UIPSAP]2.0.CO;2
A Unique Conodont Basal Structure from the Ordovician of Alabama
GSA Bulletin July 01, 1969, Vol.80, 1401-1402. doi:https://doi.org/10.1130/0016-7606(1969)80[1401:AUCBSF]2.0.CO;2
Carbon Isotopes in Pelites of the Precambrian Uncompahgre Formation, Needle Mountains, Colorado
GSA Bulletin July 01, 1969, Vol.80, 1403-1408. doi:https://doi.org/10.1130/0016-7606(1969)80[1403:CIIPOT]2.0.CO;2
The San Miguel Lava Flow, Dona Ana County, New Mexico
GSA Bulletin July 01, 1969, Vol.80, 1409-1414. doi:https://doi.org/10.1130/0016-7606(1969)80[1409:TSMLFD]2.0.CO;2
Radiometric Ages of Pleistocene Terraces from San Nicolas Island, California
GSA Bulletin July 01, 1969, Vol.80, 1415-1418. doi:https://doi.org/10.1130/0016-7606(1969)80[1415:RAOPTF]2.0.CO;2