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January (no. 1)
Solution to the Hallopus Enigma?
Jay J. Ague, Kenneth Carpenter, and John H. Ostrom

Detrital zircon provenance of Cambrian to Triassic miogeoclinal and eugeoclinal strata in Nevada
George E. Gehrels and William R. Dickinson

Origin of fibrosity and banding in agates from flood basalts
Yifeng Wang and Enrique Merino

Iapetan rift-related turbidite-fan deposits from the central Appalachian Piedmont
David W. Valentino and Alexander E. Gates

Paleomagnetic evidence for a Late Triassic age for transitional tholeiitic to alkalic diabase dikes from central Rhode Island
Suzanne A. McEnroe


February (no. 2)
Interactions of mixed volatile-brine fluids in rocks of the southwestern footwall of the Duluth Complex, Minnesota: Evidence from aqueous fluid inclusions
Jill Dill Pasteris, Teresa N. Harris, and David C. Sassani

Tectonic evolution of the Quebec-Maine Appalachians: from oceanic spreading to obduction and collision in the northern Appalachians
Nicolas Pinet and Alain Tremblay

The Taconic foredeep as sediment sink and sediment exporter: implications for the origin of the white quartzarenite blanket (Upper Ordovician-Lower Silurian) of the central and southern Appalachians
Joachim Dorsch and Steven G. Driese


March (no. 3)
A chemical and thermodynamic model of dioctahedral 2:1 layer clay minerals in diagenetic processes: dehydration of dioctahedral aluminous smectite as a function of temperature and depth in sedimentary basins
Barbara Ransom and Harold C. Helgeson

Source of carbonate and origin of zonation in pyritiferous carbonate concretions: evaluation of a dynamic model
Max L. Coleman and Rob Raiswell

Isotopic and fluid inclusion studies of fluid movement along the Gavarnie Thrust, Central Pyrenees: reaction fronts in carbonate mylonites
Andrew M. McCaig, David M. Wayne, Jim D. Marshall, Dave Banks, and Iain Henderson


April (no. 4)
Genesis and dynamics of basin compartments and seals
P. Ortoleva, Z. Al-Shaieb, and J. Puckette

U-Pb ages of metarhyolites of the Catoctin and Mount Rogers Formations, central and southern Appalachians: evidence for two pulses of Iapetan rifting
John N. Aleinikoff, Robert E. Zartman, Marianne Walter, Douglas W. Rankin, Peter T. Lyttle, and William C. Burton

Lines of basement uplifts within the external parts of orogenic belts
John Rodgers

Book Review: Pre-Mesozoic geology in the Alps; edited by J. G. von Raumer and Franz Neubauer
Review by John Rodgers


May (no. 5)
A. G. Högbom and the development of the concept of the geochemical carbon cycle
Robert A. Berner

Organic acids in hydrothermal solutions: standard molal thermodynamic properties of carboxylic acids and estimates of dissociation constants at high temperatures and pressures
Everett L. Shock

The formation of unconformity-type uranium ore deposits 1. Coupled groundwater flow and heat transport modeling
Jeff P. Raffensperger and Grant Garven


June (no. 6)
The formation of unconformity-type uranium ore deposits 2. Coupled hydrochemical modeling
Jeff P. Raffensperger and Grant Garven

Thermal history of rocks: P-T-t paths from geospeedometry, petrologic data, and inverse theory techniques
Antonio C. Lasaga and Jiang Jianxin

Abnormal pressures as hydrodynamic phenomena
C. E. Neuzil


September (no. 7)
The Paleozoic world: Continental flooding, hypsometry, and sealevel
Thomas J. Algeo and Kirill B. Seslavinsky

The carbon-isotopic composition of Proterozoic carbonates: Riphean successions from northwestern Siberia (Anabar Massif, Turukhansk Uplift)
Andrew H. Knoll, Alan J. Kaufman, and Mikhail A. Semikhatov

Crustal magma generation and low-pressure high-temperature regional metamorphism in an extensional environment; possible application to the Lachlan Belt, Australia
E-an Zen

Igenous petrogenesis and tectonic setting of plutonic and volcanic rocks of the Cordillera de Talamanca, Costa Rica-Panama, Central American Arc
Mark S. Drummond, Mark Bordelon, Jelle Z. de Boer, Marc J. Defant, Herve Bellon, and Mark D. Feigenson


October (no. 8)
Calculation of the activity of Al2SiO5: Applications to the geobarometry and geohygrometry of garnet and staurolite zone metapelitic rocks
Edward D. Ghent and Timothy W. Grover

Progressive deformation and fracture patterns during foreland thrusting in the southern Appalachians
Gregory C. Ohlmacher and Atilla Aydin

Redetermination and reevaluation of compositional variations in metamorphosed sediments of the Littleton Formation, New Hampshire
Bill E. Moss, Larry A. Haskin, Robert F. Dymek, and Denis M. Shaw

Mass transfer during Barrovian metamorphism
Comment: John V. Walther and Michael J. Holdaway; Reply: Jay J. Ague


November (no. 9)
Mantle flow beneath the Pacific Plate: evidence from seamount segments in the Hawaiian-Emperor chain
Phillip D. Ihinger

Oxygen isotope geochemistry of the Al2SiO5 polymorphs
Z. D. Sharp

Long-term control of atmospheric carbon dioxide: Low-temperature seafloor alteration or terrestrial silicate-rock weathering?
Ken Caldeira

Crystal chemistry of kaolinite and Fe-Mn oxides: relation with formation conditions of low temperature systems
Jean-Pierre Muller, Alain Manceau, Georges Calas, Thierry Allard, Philippe Ildefonse, and Jean-Louis Hazemann

Genesis of agates in flood basalts: twisting of chalcedony fibers and trace-element geochemistry
Enrique Merino, Yifeng Wang, and Étienne Deloule


December (no. 10)
Preservation of premetamorphic oxygen and carbon isotopic trends in granulite facies marbles from Rogaland, southwest Norway
Luc C. G. M. Bol, Timo G. Nijland, Paul C. C. Sauter, J. Ben H. Jansen, and John W. Valley

Sedimentary basin taper as a factor controlling the geometry and advance of thrust belts
Steven E. Boyer

Thermodynamic properties of aqueous species and the solubilities of minerals at high pressures and temperatures: the system Al2O3-H2O-NaCl
Vitalii A. Pokrovskii and Harold C. Helgeson


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