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Appendix B
U.S. Geodynamics Committee:
Reportorial Topics and Reporters
The U.S. Geodynamics Committee (USGC) was established in 1969 to foster and
encourage studies of the dynamic history of the earth, with appropriate attention
to both basic science and applications. The USGC also serves as the U.S. national
committee for the International Lithosphere Program (ALP).
In the 1970s, the U.S. Geodynamics Committee served as the U.S. counterpart
to the International Geodynamics Project. The USGC developed recommendations
for U.S. participation in the Geodynamics Project, published as U.S. Program for the
Geodynam~cs Project: Scope and Objectives (1973~. Three additional major reports
were prepared by the USGC more recently: Continental Scientific Drilling Program
(1979), Geodynamics in the 1980s (1980) and The Lithosphere: Report of a Workshop
(1983~.
To implement its recommendations, the USGC established a system of special
priority topics and corresponding reporters.
The term "reporter" can be misreading. The USGC adopted this word from the
usage in international geophysical programs in which it has a connotation of activity
and responsibility. The duty of each reporter is to provide recommendations to the
USGC regarding steps that could be taken to implement the topic or priority in
question.
Much of the work of the USGC is based on the activities and recommendations
of the reporters and the groups that they have convened. Meetings have ranged
from small groups to two major workshops on continental scientific drilling. These
activities have led to well-defined results including the following: deep reflection
profiling programs; preparation and publication of the plate margins cross sections;
the Continental Scientific Drilling Program; and the North American Continent-Ocean
Transects Program.
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86
The reportorial topics adopted by the USGC are subject to continual review, with
additions and phasing out as appropriate. In addition, the USGC has designated
USGC-~LP reporters.
USGC Reportorial Topics and Reporters
Seismic Reflection Profiling
Continent-Ocean Transects
Geodynamic Data
Sedimentary Systems
Chemical Geodynamics
Internal Processes and Properties
Mantle Dynamics
Crustal Dynamics
Fluids in the Crust
Global Seismology
Continental Drilling
Marine Geology and Geophysics;
and Planetology
Voicanic Hazards
I,arry Brown
Robert C. Speed
William J. Hinze
Peter R. Vail
Donald J. DePaolo
Raymond JeanIoz
Bradford H. Hager
Leigh H. Royden
Mark D. Barton
Stewart W. Smith
Mark D. Zoback
Sean C. Solomon
Grant H. Heiken
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USGC-lLP Reporters
In recognition of the importance of linkage and interaction between the USGC and
the ILP, those U.S. scientists who have major responsibilities on the Inter-Union
Commission on the Lithosphere (JCL) are designated as USGC-~LP reporters.
L,ithosp}zere Program Topics Working Group (WG) or Coordinating Committee (CC)
WG-1
WG-2
.\
WG-3
WG-4
WG-6
Recent Plate Movements and Deformation
Nature and Evolution of the
Continental Lithosphere
Task Group A. Variations in the Nature
and Evolution of Mobile Belts
Task Group B. Plate Motions and Orogeny
through Time
Task Group C. Thermal, Mechanical, and
Cherrucal Evolution of the
Continental Lithosphere
Intraplate Phenomena
Nature and Evolution of the
Oceanic Lithosphere
WG-5 Paleoenvironmental Evolution of
the Oceans and Atmosphere
Structure, Physical Properties,
Composition, and Dynamics of the
Lithosphere-Asthenosphere System
Task Group A. Structure
Task Group B. Physical Properties
Task Group C. Dynamics
Task Group D. Composition
CC-1 Environmental Geology and Geophysics
CC-2 Mineral and Energy Resources
CC-3 Geosciences Within Developing Countries
CC-4 Continental Drilling
CC-5 Data Centers and Data Exchange
CC-6 National Representatives
Subcommittee on the Arctic
CC-7 Global Geoscience Transects
Robert S. Yeats (ch)
Christopher R. Scotese
(ch TG-B)
Gerald Schubert
(vc TO-C)
Mary Lou Zoback (mb)
John C. Mutter (ch)
George Kiersch (ch)
Mark D. Zoback (ch)
Michael A. Chinnery (mb)
William J. Hinze (mb)
Frank M. Richter (US rep)
G. Leonard Johnson (ch)
Randall Van Schmus (mb)
(and leader, N.Am. sec-
tion)
John W. Harbaugh (mb)
Role on the ICL WG or CC: ch = chairman; vc = vice chairman; mb = member.
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Representative terms from entire chapter:
reportorial topics
