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CAVEPS and Quaternary Extinction Symposium
March 29 - April 2, 2005
Naracoorte, SA, Australia
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“The World of Elephants”
Hot Springs, South Dakota, USA September 22-25, 2005
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Pacific Cell
Rocky Mountain Cell
Pacific Northwest Cell
Southeast Cell
Northeast Cell
Midwest Cell
Pacific Cell
February 17-19, 2001
Death Valley, California
The Pacific Cell FOP trip for 2000 (postponed) will be in Death
Valley. Primary leaders include Ralph Klinger (University of
Colorado-Boulder), Jeff Knott (University of California), Michael Machette
(USGS-Denver) and Andrei Sarna-Wojcicki (USGS-Menlo Park).
The
preliminary itinerary includes a day looking at tectonics and
Plio
Pleistocene stratigraphy along the Furnace Creek fault zone in
Northern Death Valley (Klinger), a day on the late Cenozoic deposits of the
Furnace Creek area (Machette), and a day on late Pliocene and Pleistocene
stratigraphy, slip rate of the Death Valley fault zone, and evidence for
pluvial lakes (Knott).
The trip will probably be limited to 150
participants owing to our field trip permit with the National Park Service.
However, we will have use of the Texas Springs Campground (group sites and
individual). Anticipated price is $30-40. We will use the last Pacific Cell
FOP e
mail list for our first notification this fall. If you want to be
added to the list, contact Michael Machette, U.S. Geological Survey, MS
966, PO Box 25046, Denver, CO 80225; 303-273
8612; Fax: -8600; machette@usgs.gov
Rocky Mountain Cell
September 22-24,
2000
Capitol Reef National Park and vicinity
The Rocky
Mountain Cell will be doing the "Red Gate to Blue Gate" (G.K. Gilbert's
1870's terms) tour of Boulder Mountain, Waterpocket Fold, the Fremont
valley and vicinity. There will be an optional trip to the north (Hartnet
and Cathedral valleys) the day after the field trip if there is enough
interest.
Topics: (1) Late-Wisconsin glacial moraines and drift on
NE flank, Boulder Mtn. (2) Landslides off Boulder Mtn, Flat Top, and
farther-north volcanic mesas, where some slides transform to debris
avalanches; and down the Fremont valley and tributaries to great debris
flows and thence to bouldery floods (analogous to cataclysmic
avalanche-to-debris flows off Mount St. Helens volcano in 1980). (3)
Whether diamicts of "Carcass Creek" (= Bull Lake) age, low on Boulder Mtn,
are glacial drift (classic interpretation of RF Flint and CS Denny, 1958)
or are they debris-avalanche deposits. (4) Similarly, are coarse-bouldery
deposits of terraces extending far downstream in Fremont valley and
tributaries outwash as traditionally supposed or debris flows and floods
transformed from repeated wet debris avalanches. (5) Cosmogenic dating of
some of these bouldery deposits from far upvalley to far downvalley. (6)
Revisit and re-argue at least 2 topics and 1 site that GK Gilbert
incorporated to his famous 1875 report on nearby Henry Mountains. (7)
Possible auxiliary geomorphic topics (a) origin of some deeply incised
meanders and (b) whether some "natural bridges" are genetic arches, but
some "arches" genetic bridges. (8) Several examples of rock art and
architecture from type region of Fremont Culture (Anasazi). (9) Summary of
classic Permian through Miocene layered sedimentary rock stunningly
displayed between Boulder Mtn and the Henry Mtns across Circle Cliffs
anticline and Waterpocket Fold monocline.
Co-leaders: Richard
Waitt (USGS); Thure Cerling and Dave Marchetti (U. Utah); Lee Kreutzer and
Adrienne Anderson (NPS). Contact: Richard Waitt; waitt@usgs.gov
Pacific Northwest
Cell
Newberry Volcano, central Oregon
September 15-17, 2000
Since the creation of Newberry National Volcanic Monument in 1990,
a number of exciting discoveries and puzzles in geology and archaeology
have come to light at Newberry Volcano in central Oregon. This large
Quaternary volcano has been active for at least a million years, and its
flanks and caldera have hosted numerous Holocene eruptions including the
1300-year-old Big Obsidian Flow. Among the recent developments at Newberry
is the discovery of a large Holocene paleoflood, Holocene uplift of the
caldera floor, human use and occupation throughout the Holocene including
the oldest known dwelling in western North America, drowned lake terraces
60 feet below the surface of Paulina Lake, giant bubbles in obsidian flows,
numerous silicic tephras and their stratigraphy, high temperatures in deep
geothermal drill holes, inflated basaltic lavas, and mappable basaltic
lavas and their stratigraphy. Much work is in progress, so new discoveries
and ideas may be discussed. Trip leaders will be Larry Chitwood (USFS) and
Bob Jensen (USFS) with co-leaders Bob Reynolds (COCC), Steve Kuehn (WSU),
Tom Connolly (U of O), and Julie Donnelly
Nolan (USGS). A web site has been
set up at http://www.geocities.com/pnw2000fop/ or e-mail
pnw2000fop@
yahoo.com to communicate details of the trip. Larry Chitwood, 61644 Daly
Estates Dr., Bend, OR 97702; 541-389-2373 chitwood@bendnet.com
Midwest Cell
June 1-3, 2001
Thunder Bay, Ontario, Canada
47th Midwest Friends of the
Pleistocene Field Meeting
To be held Friday, June 1st to Sunday, June 3rd, 2001 in Thunder Bay, ON.
Hosted by Dr. Brian Phillips and colleagues, Lakehead University.
The meeting will focus on the deglaciation of the borderland region and the
associated paleoindian presence. The interplay between Rainy River ice, the ice
of the Marquette readvance, eastern outlets of Lake Agassiz and the
sequence of lakes in the Superior basin will be highlighted. The Saturday Field
trip will explore the Arrow Lake / Whitefish corridor west of Thunder Bay. The
Sunday morning field trip will go down the north shore to end in Grand Marais,
MN.
Accomodations will be in residences and townhouses on campus. Towards the end
of January please visit the Department of Geography web site at http://bolt.lakeheadu.ca/~geogwww/geoghp.html
for further details.
Meanwhile, to ensure that the Midwest FOP database is up to date, please send
any recent changes of e-mail or street address to bandjp@air.on.ca
if you are interested in being on the e-mail / mailing list for the First
Circular. Thank you.
Brian A. M. Phillips
Dept. of Geography
Lakehead University
Thunder Bay, ON
Southeast Cell
October
21-22
James River Basin, Lexington, Virginia Landscape evolution
in the upper James River Basin. We will be examining
landscape
responses to incision by the Maury and James Rivers. Topics include:
pediment/fan incision history, fluvial terrace chronosequences, intra
basin
capture, abandoned meanders, and stream knickpoints.
Contact: David
Harbor, Geology Department
Washington and Lee University
Lexington
VA 24450; 540-463-8871; fax: -8142; harbord@wlu.edu
Northeast
Cell
2000 NE Cell Report
A New Drainage History for
Glacial Lake Hitchcock: Varves, Landforms, and Stratigraphy
Julie Brigham-Grette (U Mass
Amherst), Tammy Rittenour (University of
Nebraska), Janet Stone (USGS Water Resources Division), Jack Ridge
(Tufts University), Al Werner, Laura Levy (Mt Holyoke College), Dena Dincauze, Kit Curran
(UMass-Amherst), Ed Klekowski, (UMass-Amherst), and
Richard Little (Greenfield Community College).
As with every FOP trip,
we provided the 85 faithful followers of this annual field conference with
a stimulating look at new research and field data regarding the regional
Quaternary history of New England. This year the trip revisited the
history of Glacial Lake Hitchcock with a focus on new evidence for the
timing of deglaciation, processes influencing lake sedimentation, and
factors influencing the drainage sequence of Lake Hitchcock. In this
context we reconsidered how the drainage history may be related to the rate
and timing of glacio-isostatic rebound. The fundamental challenge of this
work is to evaluate changes in sub-basin varve history relative to the
sequential incision and evolution of the Connecticut River. New AMS-14C
age estimates were presented to further anchor the Antev's varve
chronology. These new ages and revisions to the regional varve sequence
now provide new opportunities for evaluating the varve record as a proxy
for high resolution paleoclimate (including teleconnections with El
Niño events) in comparison with changes in North Atlantic
thermohaline circulation and rapid environmental change over the Greenland
Ice Sheet (c.f., Ridge et al., 1999; Rittenour et al., 2000). We also took
advantage of newer geochronological techniques including the optical
luminescence dating of dune complexes on geomorphic surfaces of different
relative age. Not to be overlooked was the work of Ed Klekowski and grad
student Sean Werle discovering the underwater world of the Connecticut
River related to the special habitat offered by eroding submerged varves.
Ed showed us a video of this experience!
This trip occurred some
12 years after the last FOP in this region which had a similar theme.
Though some may have assumed we once had it all figured out based on the
work presented at the 1987 FOP, it is the axiom of science that the more we
learn, the more we realize just how little we know. The notion that
Glacial Lake Hitchcock along its entire length drained as a result of the
erosion of a single dam at Rocky Hill gave way on this trip to a new
paradigm involving the northward sequential drainage of the lake as a
broken series of sub-basins controlled by local dams. We strongly
challenged a once robust feature of the valley history, i.e., the
observation that most of the ice-contact deltas all projected onto a smooth
straight line ("Koteff's curve", Koteff and Larson, 1989) suggesting uplift
progressed without warping of the regional lake shorelines. The apparent
lack of restrained rebound during deglaciation and the need to invoke
delayed post-glacial rebound until glacial ice was out of the Connecticut
valley is now especially difficult to maintain given revisions in lake
drainage presented on this trip.
The guide book (North Eastern
FOP Field Conference, U Mass Department of Geosciences Contribution No. 73)
is available from Julie Brigham-Grette, Dept. of Geosciences, Morrill
Sciences Center, Univ of Massachusetts, Amherst, MA 01003; 413-545-4840;
Fax: -1200; brigham-grette@geo.umass.edu
References:
Koteff,
Carl, and Larsen, F.D., 1989, Postglacial uplift in western New England;
geologic evidence for delayed rebound, in:, Earthquakes at North
Atlantic passive margins; neotectonics and postglacial rebound: Norwell,
Mass., Kluwer Academic Publishers, 105-123.
Ridge, J.C., Besonen, M.r.,
Brochu, M., Brown, S.L. Callahan J.W., Cook, G.J., Nicholson, R.S., and
Toll, N.J., 1999, Varve, paleomagnetic, and 14C chronologies for
Late Pleistocene events in New Hampshire and Vermont, Geographie
physique et Quaternaire 53, 79-106.
Rittenour, T.M., Brigham-Grette,
J., and Mann, M.E., 2000, El Nino-like Climate Teleconnections in New
England during the Late Pleistocene, Science 288, 1039
1042.
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