Past Field Trips

2018 Upper Arkansas Valley, Poncha Mountain Block

The Colorado Scientific Society usually has Spring and Fall field trips. Here are trip guides, maps and pictures from past field trips. The most recent field trips are listed first.

The field trip guides for some field trip’s can be downloaded, usually as PDFs. The size of files larger than 3 MB is called out in the link, e.g. “Quaternary San Luis Basin, Ancient Lake Alamosa, 2007 (PDF 4.6 MB)”. In most documents, of the text is

Field trips are grouped by decade, with the most recent first. Some field trips with many pictures and maps have their own pages.

2010-2018 Field Trips

Look here for the most recent field trips.

2000-2009 Field Trips

Coming: Field Trips from 1990s, 1980s and 1970s

Sawatch Range Fault, below Mount Princeton

Search for Field Trips by Name of trip, Leaders, Year-Month, and Keywords

  • Click on the Year-Month link in a row to open the entry for the field trip.
  • Search: You can search the table for a leader’s name, part of a field trip’s name, or other keywords. Use the Search box on the right, above the Keywords column header.
  • Sort: You can sort any column in either ascending or descending order. Use the up and down arrows in the column header line.

Note: This is a partial index, including field trips from 2005-present.  There are only entries where we have field trip guides, pictures, or other details.  Additional field trips are being added.

Information about Field Trips
  • Field trips include links to digital copies (PDFs) of trip guides and maps. Clicking on a link will open the PDF in a new tab.
  • The text in the linked articles looks original, but it is searchable and selectable. (Text in maps and cross-sections in NOT searchable or selectable, because this can degrade the figure.)
  • The sizes of large downloadable files maps are listed in the name.

Past Colorado Scientific Society Field Trips

Name of Field TripLeadersYear-Month and name linkOther Keywords
Geology of the Upper Arkansas ValleyKarl Kellogg, Cal Ruleman, Scott Minor2018-Sept, Upper Arkansas Valley Field TripNorthern Rio Grande Rift, Laramide Orogeny, magmatism, tectonism, sedimentation, Glacial outwash floods, minerals, silver, gold, molybedenum, landslide
Front Range Geomorphology and Mysterious Gravel DepositsCal Ruleman, Bob Raynolds, Beth Simmons2018- April, Front Range Pleistocene Geomorphology and Mysterious Gravel DepositsPleistocene Glaciation, Eocene Rocky Mountain erosional surface, Central City Gravel, Idaho Springs, Pinedale moraines, Clear Creek, Bear Creek
Flat Tops/White River PlateauLinda Soar, James Hagadorn2017-August, Flat Tops - White River PlateauDevonian, Paleozoic section, glacial history, Bison Lake, Crane Park Quary, Dyer Formation, vertebrate teeth
Geologic Wonders of the Hart(sel) of South ParkPeter Barkmann2017-June, Geologic Wonders of the Hartsel of South ParkHartsel, Garo Sandstone, South park Formation, Neogene from compression to extension, Pleistocene glacial outwash
Basement hosted sandstone dikes of the Colorado Front Range
(Tava sandstone)
Christine Smith Siddoway, Scott Lundstrom2016-June, Basement hosted sandstone dikes of the Front RangePrecambrian sandstone dikes, Neoproterozoic
New discoveries of dinosaur tracks and markings at Dinosaur RidgeMartin Lockley
2016-June, New Dinosaur tracks and markingsdinosaur mating scrapes
Green Mountain kimberlite pipe, Boulder ColoradoPete Modreski2013-July, Green Mountain kimberlite pipe, Boulder, CO
Catastrophic Glacial Outburst Floods on the Upper Arkansas RiverKeenan Lee, Cal Ruleman2012-Sept, Glacial Outburst Floods on Upper ArkansasLake Creek glacier, Clear Creek glacier, Pine Creek glacier, ice dam,
Pegmatites near Harris Park, COPete Modreski2012-July, Harris Park pegmatitesFamily friendly, mineral, gem, quartz crystals, Pegmatite Points,
Cumbres and Toltec Scenic Railroad Geology Train Excursion2012-June, Cumbres and Toltec Geology TrainNarrow-gauge railway
Late Cenozoic Evolution of the Colorado Rockies; Evidence for Neogene Uplift and Drainage Integration and New Insights into the
Cambrian-Devonian Depositional Systems and Paleoenvironments of Western North America
Andres Aslan, Paul MyrowFT_2011-May, Late Cenozoic evolution of Colorado RockiesGlenwood Canyon, Colorado River, Lava Creek B
Geology and Mining History of the Western San Juan MountainsGeorge MooreFT_2011-Sept-Oct, Geology of the Western San Juansmining history, Silverton, Ouray, Red Mountain, Animas Forks
Aspen region, Grand Loop Field Trip—A Tribute to Bruce Bryant2010-Sept, Grand Loop Field TripGlenwood Springs, Aspen, Independence Pass, Upper Arkansas Valley, Maroon Bells, Roaring Fork Valley, Grizzly Peak caldera
Quaternary Geology of the San Luis Basin near Alamosa, Colorado with Ancient Lake AlamosaMichael Machette2007-June, Quaternary of San Luis Basin with Lake Alamosa Sangre de Cristo fault zone, Mesita Volcano
Volcanic and Plutonic rocks of Table MountainHarald Drewes2005-April, Volcanic and Plutonic rocks of Table Mountainshoshonite, Golden, Ralston dikes