Volume 80, Number 12
December 1969
ISSN 0016-7606
EISSN 1943-2674
In this Issue
Phase Relationships in the System Fe3Al2Si3O12-Mg3Al2Si3O12-H2O at 2.0 Kilobars
GSA Bulletin December 01, 1969, Vol.80, 2393-2408. doi:10.1130/0016-7606(1969)80[2393:PRITSF]2.0.CO;2
Mesozoic California and the Underflow of Pacific Mantle
GSA Bulletin December 01, 1969, Vol.80, 2409-2430. doi:10.1130/0016-7606(1969)80[2409:MCATUO]2.0.CO;2
Magnetic Reversal Stratigraphy of the Lower Triassic Moenkopi Formation of Western Colorado
GSA Bulletin December 01, 1969, Vol.80, 2431-2450. doi:10.1130/0016-7606(1969)80[2431:MRSOTL]2.0.CO;2
Early Ordovician Chaotic Deposits in the Central Volcanic Belt of Northeastern Newfoundland
GSA Bulletin December 01, 1969, Vol.80, 2451-2464. doi:10.1130/0016-7606(1969)80[2451:EOCDIT]2.0.CO;2
Contact Metamorphism in the Kwoiek Area of British Columbia: An End Member of the Metamorphic Process
GSA Bulletin December 01, 1969, Vol.80, 2465-2494. doi:10.1130/0016-7606(1969)80[2465:CMITKA]2.0.CO;2
U-Th-Pb Chronology of Zircons from the St. Kevin Granite, Northern Sawatch Range, Colorado
GSA Bulletin December 01, 1969, Vol.80, 2495-2502. doi:10.1130/0016-7606(1969)80[2495:UCOZFT]2.0.CO;2
An Environmental Re-interpretation of the Permian Evaporite/Carbonate Shelf Sediments of the Guadalupe Mountains
GSA Bulletin December 01, 1969, Vol.80, 2503-2526. doi:10.1130/0016-7606(1969)80[2503:AEROTP]2.0.CO;2
Climatic and Tectonic Factors Affecting Water Quality in the San Joaquin Valley near Fresno, California
GSA Bulletin December 01, 1969, Vol.80, 2527-2538. doi:10.1130/0016-7606(1969)80[2527:CATFAW]2.0.CO;2
Kink Band Structures in the Valley and Ridge Province, Central Pennsylvania
GSA Bulletin December 01, 1969, Vol.80, 2539-2550. doi:10.1130/0016-7606(1969)80[2539:KBSITV]2.0.CO;2
Synorogenic Quartz Sandstone in the Jurassic Mobile Belt of Western Nevada: Boyer Ranch Formation
GSA Bulletin December 01, 1969, Vol.80, 2551-2584. doi:10.1130/0016-7606(1969)80[2551:SQSITJ]2.0.CO;2
Intrusive Sandstone Dykes in the Siamo Slate near Negaunee, Michigan
GSA Bulletin December 01, 1969, Vol.80, 2585-2594. doi:10.1130/0016-7606(1969)80[2585:ISDITS]2.0.CO;2
The A. J. Collier Thrust Belt of the Seward Peninsula, Alaska
GSA Bulletin December 01, 1969, Vol.80, 2595-2596. doi:10.1130/0016-7606(1969)80[2595:TAJCTB]2.0.CO;2
Potassium-Argon Ages on Lavas of Kohala Volcano, Hawaii
GSA Bulletin December 01, 1969, Vol.80, 2597-2600. doi:10.1130/0016-7606(1969)80[2597:PAOLOK]2.0.CO;2
New Evidence Concerning the Age of the Hawaiian Ridge
GSA Bulletin December 01, 1969, Vol.80, 2601-2604. doi:10.1130/0016-7606(1969)80[2601:NECTAO]2.0.CO;2
The Rb-Sr Whole-Rock Age of the Stearns Shale (Lower Permian), Eastern Kansas, before and after Acid Leaching Experiments
GSA Bulletin December 01, 1969, Vol.80, 2605-2610. doi:10.1130/0016-7606(1969)80[2605:TRWAOT]2.0.CO;2
Thickness of Unconsolidated Sediments in the Eastern Mediterranean Sea
GSA Bulletin December 01, 1969, Vol.80, 2611-2614. doi:10.1130/0016-7606(1969)80[2611:TOUSIT]2.0.CO;2
Polyphase Deformation in the Mozambique Belt, Northern Malawi
GSA Bulletin December 01, 1969, Vol.80, 2615-2622. doi:10.1130/0016-7606(1969)80[2615:PDITMB]2.0.CO;2
Chemical Changes in Geothermal Well M-20, Cerro Prieto, Mexico
GSA Bulletin December 01, 1969, Vol.80, 2623-2630. doi:10.1130/0016-7606(1969)80[2623:CCIGWM]2.0.CO;2
Parting Lineation in Siltstone
GSA Bulletin December 01, 1969, Vol.80, 2631-2636. doi:10.1130/0016-7606(1969)80[2631:PLIS]2.0.CO;2
The Beaver Creek Volcanics: A New Formation, Coconino-Yavapai Counties, Arizona
GSA Bulletin December 01, 1969, Vol.80, 2637-2644. doi:10.1130/0016-7606(1969)80[2637:TBCVAN]2.0.CO;2
A Note on the Occurrence of Kyanite and Chloritoid in Some Metaconglomerates in Maryland
GSA Bulletin December 01, 1969, Vol.80, 2645-2652. doi:10.1130/0016-7606(1969)80[2645:ANOTOO]2.0.CO;2
Scotsford's Metasomatic Augen Gneiss: An Additional Working Hypothesis
GSA Bulletin December 01, 1969, Vol.80, 2653-2654. doi:10.1130/0016-7606(1969)80[2653:SMAGAA]2.0.CO;2
