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Comments on GSA Today science and Groundwork articles must be no more than 900 words long and should be submitted to the GSA Today science editors via the online manuscript tracking system no more than three weeks after publication of the related article. The 900-word limit includes author names, affiliations, and references. If you would like to use a figure in your comment, please reduce the text by at least 200 words to allow space for the figure and caption. Comments and Replies are no longer printed in GSA Today, but will be posted to this Web page.
Is the Anthropocene an issue of stratigraphy or pop culture?
COMMENT: Jan Zalasiewicz, Alejandro Cearreta, Paul Crutzen, Erle Ellis, Michael Ellis, Jacques Grinevald, John McNeill, Clément Poirier, Simon Price, Dan Richter, Mary Scholes, Will Steffen, Davor Vidas, Colin Waters, Mark Williams, and Alexander P. Wolfe
   PDF (108KB) Published online September 2012, pages e21-e22, doi: 10.1130/GSATG162C.1.
REPLY: Whitney J. Autin and John M. Holbrook
   PDF (83.7KB) Published online September 2012, page e23, doi: 10.113/GSATG164Y.1.
No Late Cambrian shoreline ice in Laurentia
COMMENT: Ed Landing
  PDF (121KB). Published Online: March 2011, page e19, DOI: 10.1130/G113C.1
REPLY: Anthony C. Runkel, Tyler J. Mackey, Clinton A. Cowan, David L. Fox
  PDF (116KB). Published Online: March 2011, page e19, DOI: 10.1130/G124Y.1
A shift from lithostratigraphic to allostratigraphic classification of Quaternary glacial deposits
COMMENT: Mark D. Johnson, Carrie Jennings and Howard Hobbs
  PDF (122KB). Published Online: July 2009, page e15, DOI: 10.1130/GSATG52C
REPLY: by M.E. Räsänen, J.M. Auri, J.V. Huitti, A.K. Klap, and J.J. Virtasalo
  PDF (100KB). Published Online: July 2009, page e17, DOI: 10.1130/GSATG60Y
Impacts, mega-tsunami, and other extraordinary claims
COMMENT: Dallas H. Abbott, Edward F. Bryant, Viacheslav Gusiakov, W. Bruce Masse, Dee Breger
  PDF (118KB). Published Online: April 2008, page e12, DOI: 10.1130/GSATG9C.1
COMMENT: Richard B. Firestone, Allen West
  PDF (114KB). Published Online: April 2008, page e13, DOI: 10.1130/GSATG11C.1
REPLY: Nicholas Pinter and Scott E. Ishman
  PDF (113KB). Published Online: April 2008, page e14, DOI: 10.1130/GSATG13Y.1
The non-equilibrium landscape of the Sierra Nevada, California
COMMENT: H.F. Garner
  PDF (499KB). Published Online: March 2006, page e10, DOI: 10.1130/GSATOFe10
REPLY: M.K. Clark, G. Maheo, J. Saleeby, and K. Farley
  PDF (107KB). Published Online: March 2006, page e11, DOI: 10.1130/GSATOFe11
Subduction Zone Backarcs, Mobile Belts, and Orogenic Heat
COMMENT: David D. Blackwell
  PDF (1.8MB). Published Online: August 2005, page e8, DOI 10.1130/1052-5173(2005)015<e8:SZBMBC>2.0.CO;2
CO2 as a primary driver of Phanerozoic climate:
COMMENT: Nir Shaviv and Jan Veizer
  PDF (143KB). Published Online: June 2004, page e4, DOI 10.1130/1052-5173(2004)014<e4:CAAPDO>2.0.CO;2
An Alternative Earth
COMMENT: M.J. Van Kranendonk, Kevin Cassidy
  PDF (141KB) Published in print: March 2004, page 14, DOI 10.1130/1052-5173(2004)014<14:AAER>2.0.CO;2
REPLY: Warren B. Hamilton
  PDF (140KB). Published in print: March 2004, page 14, DOI 10.1130/1052-5173(2004)014<14:AAEC>2.0.CO;2
COMMENT: Andrew Glikson
  PDF (288KB). Published Online: March 2004, page e1, DOI 10.1130/1052-5173(2004)014<e1:AAEC>2.0.CO;2
REPLY: Warren B. Hamilton
  PDF (288KB). Published Online: March 2004, page e2, DOI 10.1130/1052-5173(2004)014<e2:AAER>2.0.CO;2