Neil F. Hurley and Rob Van der Voo

Magnetostratigraphy, Late Devonian iridium anomaly, and impact hypotheses
Geology 1990 v. 18, p. 291-294. [Abstract] [PDF]  

J. J. Papike, C. K. Shearer, and K. C. Galbreath

Reading the Moon's volcanic record by ion microprobe analysis of Apollo 14 glass beads
Geology 1990 v. 18, p. 295-298. [Abstract] [PDF]  

M. R. Strecker, P. M. Blisniuk, and G. H. Eisbacher

Rotation of extension direction in the central Kenya Rift
Geology 1990 v. 18, p. 299-302. [Abstract] [PDF]  

Ch. Noblet and J. P. Lefort

Sedimentological evidence for a limited separation between Armorica and Gondwana during the Early Ordovician
Geology 1990 v. 18, p. 303-306. [Abstract] [PDF]  

Jane Selverstone and C. Page Chamberlain

Apparent isobaric cooling paths from granulites: Two counterexamples from British Columbia and New Hampshire
Geology 1990 v. 18, p. 307-310. [Abstract] [PDF]  

Lucy McCartan, Bruce H. Tiffney, Jack A. Wolfe, Thomas A. Ager, Scott L. Wing, Leslie A. Sirkin, Lauck W. Ward, and James Brooks

Late Tertiary floral assemblage from upland gravel deposits of the southern Maryland Coastal Plain
Geology 1990 v. 18, p. 311-314. [Abstract] [PDF]  

Lynn M. Walter, Alan M. Stueber, and Ted J. Huston

Br-Cl-Na systematics in Illinois basin fluids: Constraints on fluid origin and evolution
Geology 1990 v. 18, p. 315-318. [Abstract] [PDF]  

Yves Lagabrielle and Mathilde Cannat

Alpine Jurassic ophiolites resemble the modern central Atlantic basement
Geology 1990 v. 18, p. 319-322. [Abstract] [PDF]  

Andrew Hynes

Two-stage rifting of Pangea by two different mechanisms
Geology 1990 v. 18, p. 323-326. [Abstract] [PDF]  

Dave Latin and Nicky White

Generating melt during lithospheric extension: Pure shear vs. simple shear
Geology 1990 v. 18, p. 327-331. [Abstract] [PDF]  

Peter R. Johnson, Isidore Zietz, and Kevin R. Bond

U.S. west coast revisited: An aeromagnetic perspective
Geology 1990 v. 18, p. 332-335. [Abstract] [PDF]  

R. Forrest Hopson and Karl Rarnseyer

Cathodoluminescence microscopy of myrmekite
Geology 1990 v. 18, p. 336-339. [Abstract] [PDF]  

H. J. Hofmann

Precambrian time units and nomenclature—The geon concept
Geology 1990 v. 18, p. 340-341. [Abstract] [PDF]  

Stephen A. Hall

Channel trenching and climatic change in the southern U.S. Great Plains
Geology 1990 v. 18, p. 342-345. [Abstract] [PDF]  

Robert R. Loucks

Discrimination of ophiolitic from nonophiolitic ultramafic-mafic allochthons in orogenic belts by the Al/Ti ratio in clinopyroxene
Geology 1990 v. 18, p. 346-349. [Abstract] [PDF]  

Jill S. Schneiderman

Use of reaction space in depicting polymetamorphic histories
Geology 1990 v. 18, p. 350-353. [Abstract] [PDF]  

Peter Copeland and T. Mark Harrison

Episodic rapid uplift in the Himalaya revealed by ⁴⁰Ar/³⁹Ar analysis of detrital K-feldspar and muscovite, Bengal fan
Geology 1990 v. 18, p. 354-357. [Abstract] [PDF]  

C. John Mann and Sherman P. Kanagy, II

Angles of repose that exceed modern angles
Geology 1990 v. 18, p. 358-361. [Abstract] [PDF]  

Thomas M. Lehman

Paleosols and the Cretaceous/Tertiary transition in the Big Bend region of Texas
Geology 1990 v. 18, p. 362-364. [Abstract] [PDF]  

Vicki L. Hansen

Yukon-Tanana terrane: A partial acquittal
Geology 1990 v. 18, p. 365-369. [Abstract] [PDF]  

Zakaria Lasemi, Philip A. Sandberg, and Mark R. Boardman

New microtextural criterion for differentiation of compaction and early cementation in fine-grained limestones
Geology 1990 v. 18, p. 370-373. [Abstract] [PDF]  

H. Downes

Shear zones in the upper mantle—Relation between geochemical enrichment and deformation in mantle peridotites
Geology 1990 v. 18, p. 374-377. [Abstract] [PDF]  

W. John Nelson, Thomas Pratt, Ernest Hauser, and K. Douglas Nelson

Comment and Reply on "Major Proterozoic basement features of the eastern midcontinent of North America revealed by recent COCORP profiling"
Geology 1990 v. 18, p. 378-379. [Abstract] [PDF]  

James O. Eckert, Jr., Carol Simpson, and Theresa Kalaghan

Comment and Reply on "Late Precambrian crustal extension preserved in Fries fault zone mylonites, southern Appalachians"
Geology 1990 v. 18, p. 379-380. [Abstract] [PDF]  

Dominique Frizon de Lamotte, Jean-Claude Guezou, Jean Andrieux, Marie-Anne Albertini, Michel Coulon, André Poisson, Miguel Doblas, and Roberto Oyarzun

Comment and Reply on "Neogene extensional collapse in the western Mediterranean (Betic-Rif Alpine orogenic belt): Implications for the genesis of the Gibraltar Arc and magmatic activity"
Geology 1990 v. 18, p. 381-382. [Abstract] [PDF]  

Comment and Reply on "Archean protoliths within Early Proterozoic granulitic crust of the west European Hercynian belt: Possible relics of the west African craton"
Geology 1990 v. 18, p. 382-384. [Abstract] [PDF]  

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