Axial Seamount, an active submarine volcano on the Juan de Fuca Ridge at 46°N, 130°W, erupted in
January 1998 along 11 km of its upper south rift zone. We use ship-based multibeam sonar, high-resolution
(1 m) bathymetry, sidescan sonar imagery, and submersible dive observations to map four
separate 1998 lava...
We present the WD2014 chronology for the upper
part (0–2850 m; 31.2 ka BP) of the West Antarctic Ice Sheet
(WAIS) Divide (WD) ice core. The chronology is based on
counting of annual layers observed in the chemical, dust
and electrical conductivity records. These layers are caused
by seasonal changes...
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. Fudge3, Mai Winstrup3,a, Jihong Cole-Dai4, David Ferris5, Joseph R. McConnell1,
Ken C. Taylor1, Kees C
Multibeam (1 m resolution) and side scan data collected from an autonomous underwater vehicle, and
lava samples, radiocarbon-dated sediment cores, and observations of flow contacts collected by remotely
operated vehicle were combined to reconstruct the geologic history and flow emplacement processes on
Axial Seamount’s summit and upper rift zones. The...
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Geologic history of the summit of Axial Seamount,
Juan de Fuca Ridge
David A. Clague
Monterey Bay Aquarium
Volcanic and sedimentary deposits of the Mount Jefferson area (MJA) record a fourmillion-year
history of arc-related volcanism related to the subduction of the Juan de Fuca plate
beneath North America. 171 mapped stratigraphic units over an area of 150 km² reveal four
periods of volcanic activity resulting in diverse composition...
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. David Sherrod of the U.S. Geological Survey. Though
Dave knew little about me as a scientist or person
The three studies that comprise this dissertation seek to answer significant
questions in paleoclimatology through unconventional applications of ice core
greenhouse gas data. These studies involve different gases and span the interval of time
between the Last Glacial Maximum and the Industrial Revolution, but are united by their
nontraditional use...
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completely
at home at the CIC every time I visited. David Balslev-Clausen was a willing and
The interaction of magma with continental crust at convergent margins is fundamental to
understanding if and how continents grow. Isotopic and elemental data constrain the
progressive stages of development of the magmatic underpinnings of the long-lived
Aucanquilcha Volcanic Cluster (AVC), situated atop the thick continental crust of the
central Andes...
Turbulence measurements for very stable conditions near the surface are contrasted
among three sites: a high altitude basin during winter with grass or snow-covered
grass, a broad valley with complex agricultural land use, and a more narrow valley that is
influenced by a valley cold pool and cold air drainage....
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Seaman, DavidStauffer & Matthias Zeeman
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Douglas-fir (Pseudotsuga menziesii) has a wide distribution in North America and is one of the
tree species most widely distributed outside its natural range. The species has been introduced to
Europe, New Zealand, South America, and elsewhere around the world. At present, Douglas-fir
is an accepted and integral part of...
The Upper Devonian Fenstermaker Limestone is a thickening-upward sequence
of interbedded sandy intrapelsparite and subordinate calcareous siltstone and mudstone
which averages 190 ft (58 m) thick in the northern Antelope Range. The Fenstermaker
Limestone is revised and restricted herein to include only those rocks above a basinal
shale sequence of...