Rhyolites, CRBs & the Yellowstone Hot Spot — Research by Dr. Martin Streck

Rhyolites, CRBs & the Yellowstone Hot Spot — Research by Dr. Martin Streck

Martin Streck spoke to a standing room only GSOC crowd about the work that he and a number of his graduate students have done in advancing our knowledge of the Columbia River Basalt (CRB) flows of the Miocene. His team has focused upon the rhyolite flows that occurred as a result of heating by the basalt magma that produced the CRB.

Miocene rhyolite flows in eastern Oregon have long been studied by geologists. The relationship between the rhyolitic magma and the massive amounts of CRB basaltic magma is not precisely known, although they are spatially close so infer that the rhyolite is a result either of partial melting of the crust by or fractional crystallization of the CRB magma. In fact, the spatial distribution over time of the rhyolite can give geologists ideas about the origin of the CRB magma itself.

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Nominating Committee Results

The following slate of officers has been selected by this year’s nominating committee:

President ............................... Janet Rasmussen

Vice President ......................................Bo Nonn

Secretary ............................ Paul Edison-Lahm

Treasurer .................................... Dawn Juliano

Director, 3 years ......................Larry Purchase

Director, 2 years ......................Martha Muncie

Director, 1 year........................Kirben Smoody

Nominations will be closed for this year’s slate of officers after the January meeting of the society. The slate of officers will be voted on and approved at the February monthly meeting.

The Nominating Committee members were Richard Bartels, Janet Rasmussen and Sheila Alfsen. Our thanks to the selected members and members of the Nominating Committee!

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Chris Carvalho's Killer Vegan Guacamole

Chris Carvalho's Killer Vegan Guacamole

That was a fun holiday party!!! Thanks again to Carol for hosting and everyone who pitched in and who brought yummy dishes! Here is Chris's Carvalho's Guacamole recipe.

  • 5 medium avocados
  • 2 medium tomatoes
  • 1/4 cup finely chopped onion
  • 1 4-oz. can La Victoria fire-roasted diced green chiles (mild)
  • 1 tsp. white vinegar
  • juice of one lime
  • 1 tsp. salt
  • 1/2 tsp. Tabasco
  • 1/4 tsp. black pepper
  • 1 clove garlic
  • 1 tsp. chili powder
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Rik's G.S.O.C. (Gooey-Seedy-Oatmeal-Cookies) Recipe

Rik's G.S.O.C. (Gooey-Seedy-Oatmeal-Cookies) Recipe

Former GSOC President Rik Smoody's Holiday Cookie Recipe

I saw this recipe below open near the mixer and used it as a jumping-off point. I made a quadruple batch: why bother to heat the oven for only 15 cookies? *** REMEMBER ANNUAL HOLIDAY PARTY is next week Friday December 5th for GSOC Members and their guests, at 614 NE 114th Ave. Set-up starts at 6:00 p.m. More info at http://www.gsoc.org/field-trips/2014/12/12/annual-holiday-party. ***

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Radon in the Willamette Valley: An Unexpected Hazard

Radon in the Willamette Valley: An Unexpected Hazard

At the end of the last ice age 18,000 to 15,000 years ago massive hydrologic floods ran down the Columbia River Gorge.  Originating from a huge glacial lake near Missoula, Montanta around forty floods were large enough to flood the entire Willamette Valley to a depth of 400 ft.  These floods did not just bring huge volumes of water, they brought huge amounts of rocks and sediments from the continental batholiths.  A large percentage of these rocks and sediments are composed of granite.  Granites from the Idaho batholith are high in uranium bearing minerals.  This high uranium content brings with it an unexpected hazard, radon.

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