Volume 19, Issue 4
(April/May 2009)

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Featured Articles

 

Science Article:

Understanding the Great Ordovician Biodiversification Event (GOBE): Influences of paleogeography, paleoclimate, or paleoecology?

Thomas Servais, David A.T. Harper, Jun Li, Axel Munnecke, Alan W. Owen, and Peter M. Sheehan

Abstract | PDF (492MB)

4

Groundwork:

Recruiting students to undergraduate geoscience programs through dual-credit and dual-enrollment classes

Aida A. Awad, Stephen R. Mattox

Abstract | PDF (253KB)

58

Also in this issue…

Commentary:

2009 GSA Geologic Time Scale

J.D. Walker, J.W. Geissman
Abstract | PDF (115KB)

 

See Full-issue PDF for following articles.

 

11 - Dialogue: Industry is Not the Enemy

13 - Geologic Past: “The Problem of Petroleum”

GSA’s 2009 Annual Meeting in Portland, Oregon, USA

46 - Call for GSA Committee Service

48 - GSA Foundation Update

49 - 2009 GSA Officer and Councilor Nominees

49 - Limnogeology Division Offers Kerry Kelts Award

49 - In Memoriam

50 - Calendar of Upcoming Deadlines & Events

53 - Classified Advertising

55 - Erratum

PDF (279KB)

55 - GSA News and Information

58 - Groundwork: Recruiting students to undergraduate geoscience programs through dual-credit and dual-enrollment classes

60 - Commentary: 2009 GSA Geologic Time Scale

62 - Coming in June’s GSA Today

62 - Journal Highlights

Erratum: See p. 55 of this issue.