Field trip to
What this field trip is about:
During this field trip we will see a
remarkable amount of geology including evidence of past volcanism from both
What to do during this field trip (observe, ask questions, take notes, sketch):
Make comments and descriptions and
ask questions as you go—ON THE BACK OF THIS PAGE OR ANOTHER PIECE OF PAPER (or
in field notebooks). Draw and label sketches at every field location of any geologic features or landscapes.
Remember to use a scale. Ask your instructor if you don’t understand
what to do. Also, elaborate on at least two of the field sites in a
multi page word-processed summary. Consult
web references and any of the references listed at the end of this guide (many
on hold or on reserve in the library). FIELD TRIP WRITE UP DUE JUNE 2.
Overview of trip: We will leave the
Itinerary:
EXIT 49: Go east
on SR 504. See Pringle (2002), particularly “Leg A”
OPTIONAL
STOP AT
STOP 1. HARRY
OPTIONAL
STOPS.
STOP 2. ELK
ROCK VIEWPOINT.
STOP 3
(Depending On The Weather) JRO –
STOP 4:
HUMMOCKS TRAIL: We will see blocks
and pieces of the mountain as we walk through the deposit of the great debris
avalanche of 1980.
FIELD TRIP ACTIVITIES
Exit 49: SR 504 to
STOP 1:
ELK ROCK
VIEW POINT: Sketch and label
landscape—note blown down trees. Take
notes on metamorphism of the bedrock—blackish rock is hornfels, a
recrystallized volcanic rock.
HUMMOCKS
TRAIL: We will see blocks and pieces
of the mountain as we walk through the deposit of the great debris avalanche of
1980.
Assignment: Pick
an aspect of the eruption or its effects or the deposits of previous eruptions
and write a one or two page short paper (extended abstract) using some of the
references below and/or others. Perhaps make some interpretations on the
significance of the 1980 eruption to geology in general and to how we perceive
stratovolcanoes. Be sure to cite all you references properly! In addition to
the sketches, descriptions, and notes you are taking, you must do this
assignment to get credit for this field trip. At the end of your assignment,
add a section in which you share any feelings, observations, and new
perceptions about the eruption and the landscape that you may have derived from
this trip and/or from your encounters with this disturbed landscape. Does
knowing more about this landscape and about the scale, nature, and history of
volcanic processes make you think differently about some of the other Cascade
volcanoes or about volcanism and humans in general? Please explain this. Is
this important to Pacific Northwesterners? NOTE:
Check the online rubric mentioned on the class syllabus for guidelines on
writing papers.
References (some
on hold or in the collection in Kirk Library=* …or available online)
Clynne,
Michael A.; Ramsey, David W.; Wolfe, Edward W., 2005, Pre-1980 eruptive history
of Mount St. Helens, Washington: U.S. Geological Survey Fact Sheet 2005-3045, 4
p. [accessed Jul. 7, 2005 at http://pubs.usgs.gov/fs/2005/3045]
Crandell,
D. R., 1987, Deposits of pre‑1980 pyroclastic flows and lahars from Mount
St. Helens volcano,
Dethier,
David P., 1988, The soil chronosequence along the Cowlitz River, Washington:
U.S. Geological Survey Bulletin 1590-F, 47 p.
Doukas,
Michael P., 1990, Road guide to volcanic deposits of Mount St. Helens and
vicinity,
Mullineaux,
Donal R., 1996, Pre-1980 tephra-fall deposits erupted from
*Pringle,
Patrick T., 2002, Roadside geology of
*Pringle,
P.T.; Cameron, K. A., 1999, Eruption-triggered lahar of May 14, 1984, In Pierson,
T. C. ed., Hydrologic consequences of hot-rock/snowpack interactions at Mount
St. Helens Volcano, Washington, 1982-1984: U.S. Geological Survey Professional
Paper 1586, p. 81-103.
*Scott,
Kevin M., 1988, Origin, behavior, and sedimentology
of prehistoric catastrophic lahars at Mount St. Helens,
Tilling,
Robert I., 1983, Monitoring active volcanoes: U.S.
Geological Survey, 13 p. [accessed Feb. 12, 2002 at http://pubs.usgs.gov/gip/monitor/contents.html]
Tilling,
Robert I.; Topinka, Lyn J.; Swanson, Donald A., 1984,
rev. 1990, Eruptions of Mount St. Helens--Past, present, and future: U.S.
Geological Survey, 56 p. [accessed Feb. 12, 2002 at http://pubs.usgs.gov/publications/msh/]
Wolfe,
Edward W.; Pierson, Thomas C., 1995, Volcanic-hazard zonation
for
Selected
Web References
http://vulcan.wr.usgs.gov CVO,
Cascades Volcano Observatory
http://www.geophys.washington.edu/SEIS/PNSN/ Pacific NW Seismic Network
http://www.pnsn.org/HELENS/welcome.html PNSN Mount St. Helens
(MSH) and webcam link
http://volcano.und.edu/vwdocs/msh/ Volcano
World Mount
http://geoweb.tamu.edu/misc/Trixie.html Trixie Anders’ site for Jim Fitzgerald
http://www.dnr.wa.gov/Publications/ger_washington_geology_1980_v8_no3.pdf Washington Geology Mount St.
Helens issue, July 1980
http://www.fs.fed.us/gpnf/mshnvm/index.shtml
http://www.agiweb.org/geotimes/may00/featurestory.html MSH 20 years later by Bob Tilling
http://mshinstitute.org/ MSH
Institute
http://www.dnr.wa.gov/AboutDNR/Divisions/GER/Pages/home.aspx
Division of Geology and Earth Resources
http://www2.wadnr.gov/dbtw-wpd/washbib.htm Search the online bibliography
of the geology of
http://home.comcast.net/~wa_geology/ Chris Heg’s WA Geology maps
http://www.dnr.wa.gov/ResearchScience/Topics/GeosciencesData/Pages/geology_portal.aspx
Washington Div. of Geology info
Portal---geologic maps and other info
http://www.centralia.edu/academics/earthscience/resources/resources.htm Student resources and tools at
Centralia College Earth Sciences page