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MESSAGE 1
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Dave, Larry, John (MARFAC):
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Just some information for you guys. Bob Garrison and I are team
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teaching a core class at Moss Landing in Geological Oceanography. Gary
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Greene's the guy who signed us up. An important part of the class work is a
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cruise on the Pt Sur, scheduled for either Sept 20th or the 27th. Although
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I've talk this matter over with Dave and Larry (Larry was to brief John), I
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just wanted to explain in writing what we are attempting to accomplish. The
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class work on the Pt Sur will be informally phased in with some of USGS's
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Monterey Sanc work, in particular that coordinated by Brian Edwards.
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Basically, what we would like to have on the Sur is a uniboom
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seismic system, and John's Yo-Nav navigation system, and Larry's mudseis
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recording system. If we can assemble this stuff, then the MLML class will
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get a great idea about modern data acquisition techniques in inshore
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environments, and how ones goes about addressing real geologic problems. We
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also want to do some sampling (multisampler, box corer, and maybe
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dredging).
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I'm off to Europe from the 2nd to the 26th of August. So the
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contact point about the cruise date is through Bob Garrison
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(egarris@cats.ucsc.edu). He will let you guys know as soon as he can which
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date is to be scheduled. I hope this all works out because it will be a
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grand outreach program to Moss Landing and the Cal State Univ system.
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Cheers,
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Dave
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**************************************************************
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MESSAGE 2
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>Dave:
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Thanks for the positive response. We had our first class meeting
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last Wednesday on the 30th. We (Bob Garrison and I) have a class of 11
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students. Gary Greene was there to help us get underway okay--and he did
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buy us lunch at Phils.
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The MLML Geological Oceanography class is populated mostly by
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graduate students interested in biological or environmental oceanography, a
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few have some geologic training. The students enroled in the class to
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pickup a general background in marine earth science to better career
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prepare themselves. They are a lively bunch of bright people, so the first
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class meeting was lots of fun.
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Toward the end of the day Bob and I outlined a number of scientific
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problems, identified beforehand by Gary, that the class could address in a
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one-day cruise on the Pt Sur--presently set for September 27. After some
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discussion, the class decided to attempt to map the geometry and track of a
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stream channel(s) that should have crossed the shelf area and fed into the
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head of Soquel Canyon during times of glacially lowered sea level (last
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time about 10,000 years ago). Gary says the channel fill exhibits acoustics
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characteristics (gas-charged seds) that will help us map its buried course.
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The Soquel channel problem has the additional benefit in that the map area
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is in the lee of the Santa Cruz bulge and sailing time from ML is just an
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hour or so.
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To do the mapping, and to show the class modern field equipment and
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approaches, here's what we need in the way of equipment:
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SEISMIC AND NAVIGATION SYSTEMS
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1) Uniboom--double plate, complete with streamer, amps, and
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facsimile recorder.
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2) MudSeis digital recording and display system
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3) YeoNav, and related monitors, display, recording devices
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etc, using differential GPS
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4) Sidescan
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SURFACE SAMPLING GEAR
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1) Box corer
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2) Gravity corer
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3) Multisampler
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Although MLML has a one-plate Uniboom sled, it has not been used
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much. So it would be best if we used MARFAC electronic and geophysical
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gear. Mike Prince feels the same way. But the Multisampler, I believe,
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belongs to MLML. I've never used one so I'm not sure what I'm asking for or
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getting into, but the students should have an opportunity to use the latest
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and sexiest bottom samplers.
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To efficiently carry everthing off in one day, both technically and
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scientifically, we need the following smart bodies:
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John Gan,
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Larry Kooker,
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yourself,
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Mike Prince,
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Rich Muller,
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Gary Greene
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The class will be asked to design the field experiment with respect
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to an attempt to locate and map the course of a buried stream channel(s)
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hypothesized to have fed into the head of the canyon during periods of
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shelf emergence. Theoretically, a number of superimposed channels could
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exist, each cut during different glacial episodes. Basically, a grid will
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be established for the Pt Sur to follow. Uniboom records will be used to
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identify channels and map their course. I doubt that the sidescan will help
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here, but the class should have an opportunity to also map sediment types
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(backscatter characteristrics, etc) shelfward of the head of Soquel Canyon.
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This sort of information is pretty helpful where habitat characterization
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is needed. I presume that we can tow a small sidescan (analog will do) and
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also the Uniboom sled?.
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When the grid survey work is completed, we will pull gear and
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return to sample surface sediment at interesting sidescan- or
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Uniboom-located sites. Onboard navigation plots would be really helpful
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here--can we plot our track work in real time? Also, can we provide a
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bridge display so that course and direction to a sampling site, or progress
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along a track, can be graphically or numerically presented???
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It's been some time since I helped run a high-resolution
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investigation on a ship of opportunity, so I could easily be asking for
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stupid things. But, no matter, I pretty sure that the bunch of us can carry
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out a problem-oriented outreach program in marine geo-investigations that
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will prove mutually beneficial to the Survey, our Sanctuary project there,
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the MLML class members specifically, and State College system more
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generally.
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Dennis Mann and Brian Edwards are interested in contributing to the
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overall effort and class teaching activities. So I'm keeping them, as well
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as Steve Eittreim and a few others, informed about the cruise planning
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process.
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Give me a shout next week about these general plans. Because time
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is rather short, I need a reality check before going further.
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Cheers,
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Dave
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******************************************************************
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MESSAGE 3
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Deidre:
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It was a genuine pleasure meeting you at the Greene's and talking
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over matters linked to the Pt Sur cruise of the Geological Oceanography
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class that Bob Garrison and I are teaching.
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Although I had had a few glasses of wine before we chatted, I think
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I remember asking if you would be willing to come to our laboratory session
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(at the ML Benthic Lab) of September 20, which Bob and I want to devote to
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cruise planning and bringing the class scientifically up to speed about the
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project they have chosen, which is to attempt to find and map buried
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channels leading into the head of Soquel Canyon. For your background, at
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the bottom of this email message I've pasted on two earlier messages to
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Dave Hogg of MARFAC and Bob Garrison and Lisa Marrack, and other key folks
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helping us prepare for and conduct the cruise.
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The lab begins about 1:30 pm on the 20th.
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What we had chatted about was providing an opportunity for the
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class to be briefed about your Soquel science program. And, if possible,
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1995contribute to the collection of data beneficial to your effort. Gary told
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me that you're doing some pretty interesting things in Soquel Canyon, and I
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for one would like to get informed about your findings and thinkings--can
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you show-and-tell you stuff on the afternoon of the 20th?
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The other matter we kicked around was the possibility that you
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would sail with us on the 27th and be our resident Soquel Canyon
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scientist--is this possible?? I've also asked Bob Anima of the USGS to come
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along because he's been collecting and studying inshore data along the
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northern side of Monterey Bay. The two of you would be able to accurately
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inform the class members about canyon and channel related science in
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Monterey Bay.
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I'm going to be away from my office until Monday--off to Texas A&M
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to participate in a thesis defense. I'll try to get in contact with you
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when I return.
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By the way, following your counsel, I'm working through Gary Greene
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so that we can not only get the Sur loaded before the 27th, but also sail
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as early as 0700. I know that Murphy is watching our every move, so we are
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going to need all the time we can get to solve problems and complete the
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class project in one day.
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Ciao,
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Dave
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******************************************************************
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MESSAGE 5
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Date: Tue, 26 Sep 1995 08:53:33 -0700
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To: prince@mlml.calstate.edu
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From: dscholl@octopus.wr.usgs.gov
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Subject: Folks cruising
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Cc: regarris@cats.ucsc.edu, marrack@mlml.calstate.edu, dmann@octopus,
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cdegnan@octopus, bedwards@octopus, greene@mlml.calstate.edu,
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ranima@octopus, lkooker@octopus.wr.usgs.gov, mboyle@octopus,
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eittreim@octopus, Deidres@aol.com, dhogg@octopus, pbarnes@octopus,
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shunt@octopus, cheaney@mlml.calstate.edu
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Mike:
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Fraka Harmsen of Fresno State called back and relayed that
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approximately 10 students and an instructor, possibly Fraka, will be
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joining us tomorrow on the Pt Sur.
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So, the rough-count of those sailing is presently:
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Class members, MS 141-------------------------11
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ML class instructors (Dave Scholl,
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Lisa Marrack, Deidre Sullivan)-------------------3
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ML special guests-------------------------------2
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MARFAC Specialists (Larry Kooker, Mike Boyle)----2
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ML Operations Chuck Cheaney-------------------1
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USGS particpating scientists/data specialists-----4
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Bob Anima
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Dennis Mann
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Carolyn Degnan
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Brian Edwards
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Fresno State Instructor and students ----------11
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TOTAL ANTICIPATED --------------------34
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All students and special guest have been asked to bring bag
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lunches. Those wishing to mess with ship's personnel are the following:
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Deidra Sullivan
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Lisa Marrack
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Mike Boyle
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Larry Kooker
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Bob Anima
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Bryan Edwards
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Carolyn Degnan
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Dennis Mann
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Fraka Harmsen (?)
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I would like to schedule a short science orientation meeting at
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about 0645 for the ML students and also those coming from Fresno State. Is
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this going to be okay, can I hold the meeting and not interfer with
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getting-underway procedures? I could hold the meeting after we clear the
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jetty, but I prefer to use this time to introduce folks to the various
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pieces of equipment we will deploy and the YoNav and 3.5 kHz systems in
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operations. Run time to deployment, if weather and sea state cooperate, is
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roughly an hour.
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I should be down today about 1600 to help load MARFAC gear and get
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familiar with the Pt Sur's layout and operations.
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Ciao,
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Dave
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David W. Scholl Desk: (415)-354-3127
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U.S. Geological Survey FAX: (415-354-3191
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Ms 999 Email: dscholl@octopus.wr.usgs.gov
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345 Middlefield Rd.
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Menlo Park, Calif.
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94025
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