MARCH 27-29, 2020

John Wesley Powell River History Museum | Green River, UT

Pop-up Market

Pop-up Market

Vendors and artists from near and far will be selling mineral specimens, jewelry, polished stones, and much more at the Pop-up Market on Saturday. There will also be concessions and educational booths.

Vendor Application

Vending booths highlight local artisans and rock shops with a range of items for sale. Informational booths are those of an organization providing information and/or education to the public about geology or relevant to the mineral festival with no items for sale.
      • Marketplace takes place Saturday, March28th from 9am – 4pm
      • Booth spaces are 10′ x 10′, please contact us in advance if more space is required
      • Outdoors at John Wesley Powell River History Museum, pop-up canopy recommended
      • Vendor is required to provide own tables/chairs/display
      • Electricity is not available
      • Collecting and filing sales tax is vendor’s responsibility

If you have additional questions about vending or hosting an informational booth please contact us at: info(at)

Field Trips

How to sign up for a field trip:

  • Attendees can sign up for trips during the Friday evening lecture and on Saturday and Sunday at the Festival Booth outside the John Wesley Powell Museum. The booth will open at 9am on Saturday & Sunday.
  • Field trip sign-ups are first come, first serve and must be done in-person during the festival. There’s no way to sign up in advance.
  • Field trip leaders will meet their group in the museum parking lot. Prepare to caravan to field trip sites in your own vehicle. Pack plenty of water and a sack lunch, and fill your gas tank ahead of time.
  • Send all field trip questions to Staff at the John Wesley Powell River History Museum will not be able to answer any questions.

Fossil Point Dinosaur Graveyard
Saturday (4:00 pm) & Sunday (10:30 am)
Capacity: 30 people per trip

Join paleontologist Greg McDonald on a tour of Fossil Point, a site where boulders yield large dinosaur bones that date as far back as the Jurassic Era, 145 million years ago. This extraordinary site, very close to Green River, is home to large dinosaur vertebrae, leg bones, and fantastic views of the La Sal mountains.

Grassy Trail Creek Archaeological Site
Saturday (9:15 am)
Capacity: 5 Vehicles (up to 25 people total)

Join Dr. Tim Riley as he explores the cultural landscape of Grassy Trail Creek. One of the major drainages along the Book Cliffs, Grassy Trail Creek has been called home by human communities for thousands of years. Visit a Fremont village site, learn about the radical labor disputes and martial law of the early 20th century, investigate the Sunnyside coal coking ovens used to fuel the steel industry, and wonder about the artists who made the rock art in this lesser known area of eastern Utah.

This field trip meets at the Junction of Hwy 6 & Route 123 (near East Carbon) at Xa/pm. Attendees should depart Green River by Xa/pm. Trip time from Route 123 turnoff is 3-4 hours. Round trip travel is ~120 miles. Accessible to all cars. Expect some dirt road driving and short hikes. Bring water, snacks, sun gear, and comfortable walking gear.

Dr. Tim Riley is the Curator of Archaeology at the Prehistoric Museum at Utah State University Eastern in Price. Within the field of archaeology, his specialty is paleoethnobotany, or the study of past human use of plants for subsistence and other aspects of material culture.

Crescent Junction Rock Art
Saturday (11:00 am)
Capacity: 15 people

Vehicles: Capable of travel on dirt roads, clearance dependent on road conditions. Driving time: 30 minutes from Green River. Trails: First site is roadside; second site 1 mile walking in a wash; and third site 1/2 mile walk on a trail. Suggested items: Water, lunch/snacks, walking shoes, walking sticks, hats, sunscreen, and camera.

Join Steve Acerson of the Utah Rock Art Research Association (URARA) on a guided trip to cultural sites where early inhabitants left images of events and life during their existence. Time frame could be 1000’s of years in the past to current peoples returning and using these places to connect with nature and ceremonies. Visits will be with respect and reverence that these sites deserve. We’ll be walking in areas where natural conditions can be seen that shows how erosion affects the landscape and how water sources are important for the survival of plants and animals that live here. Cultures that could have created these images might include: Ancestral Puebloans, Fremont, Paiute, and Ute.

Steven Acerson past President of URARA, is currently a regional representative to the BLM Salt Lake Field Office. As a member of URARA, he’s been leading Field Trips for the last 9 years. Raised in Green River, he enjoys the canyons and rock art images the native cultures left behind for us to ponder.

Rockhounding in the Swell
Saturday (9:30 am) & Sunday (9:30 am)
Capacity: 20 people per trip

The trip location is 1.5 hours driving time from Green River and is an all day trip – half day at Septarianville site and half day at Dragon Valley site.

Septarianville is a septarian concretion mine in the Mancos Shale where you can dig your own concretions. The concretions here are unique, with many containing a red calcite center surrounded by black aragonite and often with clear or honey calcite. You may want to bring a crack hammer and chisels to dig with as the shale can be somewhat hard. We excavate down to the level of the concretions, getting below the frost zone so you can find whole concretions that have not been broken by freezing and thawing. Prices and $1.50-$2.50/pound for whole concretions (concretions 3” or less are $2.50/pound).

Bring a lunch and then stay for a trip to Dragon Valley. Dragon Valley is lower in the Mancos Shale, in the Juana Lopez Member. These rocks were deposited when the ocean was a little bit more shallow than that of Septarianville. At Dragon Valley you can find Scaphites fossils and ammolite, the rare iridescent pieces of shells of large ammonites. You will want a rock hammer and bag or containers to put your samples in. There is a short hike to get to the exposures (less than a quarter mile). The cost is $75/person and you keep what you find, unless a rare museum quality specimen is found, in which case we work with the museum to have it donated and you will be recognized for the contribution.

Dr. Janet Bertog has a PhD in geology and paleontology and has been working in the San Rafael Swell for 16 years. She recently retired as a professor at Northern Kentucky University and is now operating the mines at Septarianville and Dragon Valley.

Rockhounding the Cretaceous Ash Disaster
Saturday (12:00 pm)
Capacity: TBA

John Foster is the curator of collections at the Utah Field House of Natural History State Park Museum in Vernal. He mainly works in the Morrison Formation but has been known to stray into the Cretaceous now and then.

Trip Location is 1 hour 15 min driving time from Green River.

The Cretaceous-age Naturita (Dakota) Formation contains several white ash beds that are within coal deposits and which extend from eastern Utah around Westwater at least as far east as Grand Junction, Colorado (where they can be found along at least one of the golf courses!). These white ash layers preserve abundant plant fossils including the ferns Matonidium and Gleichenia. We will be collecting these fossils from a BLM outcrop near Westwater, and participants can keep up to 25 lbs of specimens for personal use (the ash is pretty light so you probably won’t need even that much). The site is right off the road so regular vehicles should be fine. Please pack a lunch, bring water (and a hat if it’s warm), and standard digging tools such as a rock hammer and small chisel. If anyone has a small paleo-pick, we could use a couple of those to dig small badger-holes, as the ash is usually down a bit below the coal and you need to burrow a little. Don’t wear clothes you want to keep clean because you tend to come out of here looking like a coal miner. Also, each person must keep their diggings to a small surface pit well less than 1m-square.

Buckhorn Wash Rock Art
Sunday (10:00 am)
Capacity: 15 people

Join Steve Acerson of the Utah Rock Art Research Association (URARA) on a guided trip to see the rock art panels of Buckhorn Wash in the San Rafael Swell. On this trip we will see images of native cultures left hundreds/thousands of years ago.

This trip departs from the John Wesley Powell River history Museum in Green River. A high clearance vehicle is recommended. Round trip travel is around 120 miles. Trip length 4-6 hours. Bring water, snacks, sun protection, and walking sticks if needed. Camera and binoculars recommended.

Steven Acerson past President of URARA, is currently a regional representative to the BLM Salt Lake Field Office. As a member of URARA, he’s been leading Field Trips for the last 9 years. Raised in Green River, he enjoys the canyons and rock art images the native cultures left behind for us to ponder.

Lodging & Directions


CNY – Canyonlands Field Airport – Moab, UT (34 mi)
GJT – Grand Junction Regional Airport, CO (102 mi)


Rent a van from Rabbit Rentals (South Broadway in Green River)


Greyhound stop from East and West


Amtrak Green River station (GRI) – California Zephyr line


Robber’s Roost Motel, River Terrace Inn, and Skyfall Guestrooms


Swasey’s Beach, Goblin Valley State Park, and Green River State Park