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Thurs., Aug. 29, 4:00-5:00 p.m., “Bob Weimer Colorado School of Mines Geology Trail Tour”, “Meet at the west entrance of Berthoud Hall and bring a water bottle”; open to all. The Colorado School of Mines weekly Van Tuyl Lecture Series is free and open to the public, every Thursday (except during term breaks) at 4 p.m., in Berthoud Hall Room 241. The first regular lecture will be Sept. 5; for the full Fall schedule see


Aug. 30-Sept. 2, Ken King (retired geologist) is holding a Rock & Mineral Yard Sale and (free or mostly free) giveaway of specimens especially to teachers, at his home, 2949 Vivian St., Wheat Ridge (south off 32nd Ave. east of Youngfield, on the right by the curve at the end of the block). Ken says, “I have a lot of Ruck’s Pit (calcite crystals replacing fossil clams), Texas Springs (agatized limb casts), Blue Mountain agates, etc. I am also planning a 8x2 ft "hunt" pan for kids that will have sharks and ray teeth, quartz, fluorite, garnet crystals. Lots of invertebrate fossils and stuff.” You can write to Ken at [email protected], or just show up. I imagine the hours will be 9 a.m. to 5 p.m. Ken has held a similar rock sale/freebie giveaway several times in the past couple years. He says “this may be the last time”, if he can dispose of most of his material.


Tues, Sept. 3, “Golden Beer Talks” at the Buffalo Rose, 1119 Washington Ave., Golden. First talk for the Fall: Rebecca Lynn Brice, “Tree Rings and Snow Drought: What Trees Tell Us About our Changing Snowpack”. Held on (usually?) 2nd Tuesdays. Doors open at 6; Talk begins at 6:35; Intermission – 7-7:15; Q&A/clean up 7:15-8. Here is the rest of the schedule for the Fall:

Oct 15,  Donald Sweetkind, Geologist, USGS, “From Uravan to Rulison: Tales from Colorado’s Nuclear Past”

Nov 12, Bob Raynolds, Geologist, CSM Adjunct Prof and DMNS Research Associate, “Australopithecines to the Anthropocene: A Geologist’s View of Where We Came from and Where We Are Going

Dec 10, Barb Warden,, “Funiculars of Golden Colorado”.


Wed., Sept. 4, 4:00-5:00 p.m., CU Geological Sciences Colloquium Series, Benson Earth Science Building Room 180, Karen Chin, Department of Geological Sciences: Associate Professor, University of Colorado Boulder, “Analyses of dietary residues within Cretaceous dinosaur dung: surprising insights into the feeding habits of large herbivorous dinosaurs.”


Fossilized feces shed light on the behavior of extinct animals, the structure of ancient ecosystems, and the movement of carbon resources through paleoecosystems.  A rare assemblage of fossilized feces from the Upper Cretaceous Kaiparowits Formation of Southern Utah reveals unusual dietary habits that challenge common assumptions about the feeding behavior of large herbivorous dinosaurs.  Analyses of multiple coprolite deposits from different stratigraphic levels indicate that some plant-eating dinosaurs consumed rotted wood and crustaceans, probably as a seasonal food source. This discovery suggests feeding behaviors that have no modern equivalents and appear to reflect nutritional requirements related to fundamental differences in life history strategies between megaherbivorous mammals and dinosaurs.

Please also join us for Colloquium Social Hour after the Colloquium, 5 to 6 p.m., BESC 185, “An hour of science, socialization, and good food and drink!”


Fri., Sept. 6, 3:00-4:00 p.m., Denver Museum of Nature & Science Earth Sciences Colloquium,

Flowering plants enter the canopy: Fossil woods and the Cretaceous diversification of flowering plants, by Nathan Jud, William Jewell College. VIP Room at DMNS; all are welcome.


Sept. 6-15, Colorado Mineral and Fossil Fall Show, Crowne Plaza Hotel - Airport, 15500 E. 40th Ave. Denver, CO. See .


Sept. 6-16, Denver Coliseum Mineral, Fossil, and Gem Show. There are actually 5 separate gem & mineral shows taking place here, at the Denver Coliseum (south side of I-70) and the National Western complex (north side), one of which is wholesale only, the rest are retail and open to the public; see .


Sept. 7-8, 1st Annual Denver “Just Minerals Event”, Embassy Suites Hotel, 4444 N. Havana St.; wholesale and retail mineral dealers.


Wed., Sept. 11, 6-9 p.m., Colorado School of Mines Geology Museum Annual Open House, to showcase new exhibits for the opening of the Denver Gem and Mineral Show. 1310 Maple St., Golden CO; all are invited. Campus parking is free after 5 p.m.


Sept. 11-14, Denver Fine Mineral Show, Denver Marriott West, 1717 Denver West Blvd.; see


Sept. 13-15,  52nd annual Denver Gem and Mineral Show, Denver Mart, 451 E 58th Ave., Denver, CO.  Minerals of Canada is the 2019 show theme. See


Thurs., Sept. 19, 5:30 p.m., Colorado Scientific Society hosts an evening of short oral talks and geology/earth science poster presentations; all are invited and welcome. At the Arbor House, Maple Grove Park, 14600 W. 32nd Ave., Golden (Applewood area). Social time, complimentary refreshments, and poster viewing, 5:30 p.m.; 7:00 p.m., oral presentations (4 15-minute talks). For more info see


Sat., Sept. 28,  9 a.m. – 3 p.m., “Scout Day” at Dinosaur Ridge. “Join us for Scout Day at Dinosaur Ridge. Scouts of all ages will have a fun-filled day of geology and paleontology. Cub Scouts and Webelos will be able to earn belt loops and academic pins. Boy Scouts will be able to earn their Geology Merit Badges. There will be amazing vendors such as: Mr. Bones, Western Interior Paleontological Society, USGS, Wildlife Experience, Rocky Mountain Bird Observatory plus Dinosaur Ridge volunteers at the paleontological sites along the Ridge AND manning hands-on activities such as gold panning, metal detecting, track painting, and fossil sifting at our Main Visitor Center. For more info, and to register in advance ($6 for Scouts, $5 for non-Scout accompanying friends/family) see .


Sat.-Sun., Oct. 5-6, the Colorado Scientific Society will host a weekend field trip, “Geology and Geoheritage of the Florissant-Cañon City-Florence area”. It will include Florissant Fossil Beds National Monument; Skyline Drive by Cañon City; Royal Gorge; the Florence coal, oil, and gas basin; the Cope-Marsh quarries at Garden Park; and the Cripple Creek and Victor Gold Mine. You must be a CSS member to take part, but anyone may join the Society if they wish to go on the trip; see .


Tues., Oct. 8, 7:00-9:00 p.m. Western Museum of Mining and Industry Speakers' Bureau Lecture: " Cripple Creek’s Cresson Mine: The Untold Stories”, by Ben Elick. WMMI, 225 North Gate Rd., Colorado Springs.  $5 per person, free to museum members. RSVP to 718-488-0880 or [email protected]; to book in advance:

Oct. 13-19 is the annual Earth Science Week. I (Pete Modreski) will be leading a geology hike/field trip for the public sometime during or around this week--details TBA.


Sat., Oct. 19,  9 a.m. – 3 p.m., “Girl Scout Day” at Dinosaur Ridge. An event similar to Scout Day on Sept. 28; more info about this day will be forthcoming.


Mon., Oct. 28, 3:00-4:00 p.m., Denver Museum of Nature & Science Earth Sciences Colloquium, Physical processes in carbonate sediments: Ooids, mud, hurricanes, and more, by Lizzy Trower, CU Boulder. All are welcome. VIP Room at DMNS.



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For more lecture series during the year see:


Colorado Beer Talks (2nd Tuesday, 6-8 p.m.), Windy Saddle Café, 1110 Washington Avenue, Golden, “Golden’s grassroots version of TED talks, Expand your mind with a beer in your hand”,

Colorado Café Scientifique in Denver, monthly lectures on science topics held either at Blake Street Station or Brooklyn’s, Denver; open to the public, no charge other than refreshments you may choose to purchase; see .

Colorado Scientific Society (3rd Thursday, 7 p.m.), see . Meets at Shepherd of the Hills Church, 11500 W. 20th Ave., Lakewood CO, except when noted.

CU Geological Science Colloquium (Wednesdays, 4 p.m.) see

CSU Dept. of Geoscience Seminars (Fridays, 4 p.m.), see

Van Tuyl Lecture Series, Colorado School of Mines, (Thursdays, 4 p.m.):

Denver Mining Club (Mondays, 11:30), see .

Denver Museum of Nature and Science, Earth Science Colloquium series, 3:00-4:00 p.m., VIP Room unless noted, day of the week varies. Museum admission is not required; see

Denver Region Exploration Geologists Society (DREGS; 1st Monday, 7 p.m.),

Florissant Scientific Society (FSS); meets monthly in various Front Range locations for a lecture or field trip; meeting locations vary, normally on Sundays at noon; all interested persons are welcome to attend the meetings and trips; see for details and schedules.

Nerd Night Denver is a theater-style evening featuring usually 3 short (20-minute) TED-style talks on science or related topics; held more-or-less monthly at the Oriental Theater, 4335 W. 44th Ave., Denver; drinks are available; for ages 18+.  Admission is $6 online in advance, $10 at the door. See .

Rocky Mountain Map Society (RMMS; Denver Public Library, Gates Room, 3rd Tuesday, 5:30 p.m.),

Western Interior Paleontological Society (WIPS); beginning January 2019, WIPS will meet on the 1st Monday of the month, 7 p.m., at Lowry Conference Center, 1061 Akron Way, Denver. See .

Thanks to Peter J. Modreski for keeping us up to date!
To be added to his email list for upcoming events, send request to
pmodreski @