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U.S. GEOLOGICAL SURVEY

Emil D. Attanasi
John H. Schuenemeyer

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This report is preliminary and has not been reviewed for conformity to U.S. Geological Survey editor...

James D. Catheart

September 2016

This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey edit...

Charles L. Oman
Robert B. Finkelman
Ronald T. Talley

January 1992

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U.S. Geological Survey and

Carroll Ann Hodges
Dennis P. Cox
Donald A. Singer
Byron R. Berger
John P. Albers
O Lozano Quiroga
O Espinosa Baquero
Humberto Gonzalez Iregui
Abigail Orrego Lopez
Alfonso Arias Tauta
Carlos Cedeno Ochoa
Oscar Pulido Ulloa
Alvaro Murillo Rodriquez
Manuel Jose Diaz
Hermann Duque-caro
Rodrigo Vargas Higuera
Alberto Nunez Tello
Jairo Alvarez Agudelo
Clemente Ropain Ulloa
Joaquin Buenaventura Arango
O Mendoza Forero
Gloria Rodriquez Sierra
Luis Jaramillo Cortes

September 2016

This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey edit...

U.S. Geological Survey and

Carroll Ann Hodges
Dennis P. Cox
Donald A. Singer
Byron R. Berger
John P. Albers
O Lozano Quiroga
O Espinosa Baquero
Humberto Gonzalez Iregui
Abigail Orrego Lopez
Alfonso Arias Tauta
Carlos Cedeno Ochoa
Oscar Pulido Ulloa
Alvaro Murillo Rodriquez
Manuel Jose Diaz
Hermann Duque-caro
Rodrigo Vargas Higuera
Alberto Nunez Tello
Jairo Alvarez Agudelo
Clemente Ropain Ulloa
Joaquin Buenaventura Arango
O Mendoza Forero
Gloria Rodriquez Sierra
Luis Jaramillo Cortes

September 2016

This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey edit...