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2:41

New rock specimens, fresh from polishing

2:46

Grinnell Glacier, Montana

3:33

Incidental Tiltometers

0:59

A brief report from the Bering Sea

2:16

A visit to the "dumbbell" tarn at Siyeh Pass

3:24

Primary Sedimentary Structures in Helena Formation Limestone

While in Glacier National Park, Montana, geoscience educator Callan Bentley takes viewers on a tour of the terrific variety of primary sedimentary structures that can be observed (and interpreted!) in limestone of the Mesoproterozoic Helena Formation (Belt Supergroup), exposed near the terminus of Grinnell Glacier. The exemplary stromatolites of the Helena are included.
Watch the Grinnell Glacier video mentioned here: ua-cam.com/video/kJh331czn-w/v-deo.html
Learn more about paleo-up indicators here: opengeology.org/historicalgeology/tools-of-historical-geology/way-up-structures/

Відео

2:41

Visiting Grinnell Lake

Переглядів 9321 день тому

Geologist Callan Bentley visits (Lower) Grinnell Lake for the first time.

New rock specimens, fresh from polishing

2:46

New rock specimens, fresh from polishing

Переглядів 12321 день тому

Callan Bentley shows off a handful of new rock specimens (for teaching geology) that have just been ground down to a fine polish.

3:33

Grinnell Glacier, Montana

Переглядів 17628 днів тому

Geologist Callan Bentley introduces viewers to the terminus of Grinnell Glacier in Glacier National Park, Montana.

0:59

Incidental Tiltometers

Переглядів 3228 днів тому

Two short clips showing the relative motion of the research vessel Sikuliaq compared to two fluid levels: (a) the Bering Sea horizon, and (b) a brewing pot of coffee.

2:16

A brief report from the Bering Sea

Переглядів 706Місяць тому

Callan is on a research vessel transiting the Bering Sea. He considers the history of what lies beneath the waves.

A visit to the "dumbbell" tarn at Siyeh Pass

3:24

A visit to the "dumbbell" tarn at Siyeh Pass

Переглядів 103Місяць тому

Hiking up from Siyeh Bend to the cirque below Siyeh Pass, one finds a double-lobed tarn. Geologist Callan Bentley points out a few of the sights there.

7:22

Geology of Sun River Canyon

Переглядів 244Місяць тому

Geologist Callan Bentley explores Sun River Canyon, west of Augusta, Montana, to look at numerous examples of Mississippian-aged carbonates thrust-faulted atop Cretaceous shales and sandstones of the Western Interior Seaway.

Geology of Birch Point Beach State Park, Maine

9:57

Geology of Birch Point Beach State Park, Maine

Переглядів 4902 місяці тому

Geologist Callan Bentley visits Maine's Birch Point Beach State Park and makes some observations about the geologic phenomena on display there.

4:57

Tonoloway Mudcrack Wall

Переглядів 14 тис.4 місяці тому

Geologist Callan Bentley guides you on a virtual field examination of an old quarry near Baker, West Virginia, where you can view a superb "wall" of mudcracked limestone from the Silurian Tonoloway Formation.

$Joints in Gelatin - fracture anatomy with an injection of Plaster of Paris$ 7:41 $Joints in Gelatin - fracture anatomy with an injection of Plaster of Paris$

Joints in Gelatin - fracture anatomy with an injection of Plaster of Paris

Переглядів 3014 місяці тому

Geologist Callan Bentley makes a beautiful fracture (a "joint") by injecting Plaster of Paris into a clear gelatin "rock" under compressive stress.

22:38

STEMSEAS2YC

Переглядів 3216 місяців тому

A video introduction to the November 2023 sailing of two-year college faculty with the STEMSEAS program aboard the R/V Thomas G. Thompson, from Seattle, WA to Honolulu, HI.

Cenote geology in the Yucatan Peninsula of Mexico

5:14

Cenote geology in the Yucatan Peninsula of Mexico

Переглядів 3988 місяців тому

A family trip to Mexico gives geologist Callan Bentley a chance to immerse himself in the region's distinctive karst landscape.

Dredging one of the world's largest submarine landslide deposits

5:20

Dredging one of the world's largest submarine landslide deposits

Переглядів 5009 місяців тому

On the Seattle-to-Honolulu STEMSEAS2YC transit aboard the R/V Thompson, we got to be part of a test of dredging equipment on a seamount at ~3.5 km depth above the massive Nu'uanu Landslide, which is sourced to the flank of northeast Oahu.

10:49

Geology of Diamond Head, Oahu, Hawaii

Переглядів 1,3 тис.9 місяців тому

A 'STEMSEAS' expedition lands Callan on Oahu for a day, and he takes advantage of being there to hike Diamond Head, a tuff cone outside of Honolulu. In this video, Callan presents some geological observations on the trail to Diamond Head's summit.