May 16 2014

Pictures from field school

The pictures are from the Carlin Canyon, Nevada Field School instructed by Dr. Charles Henderson and Dr. Benoit Beauchamp at the University of Calgary. However, this page has no affiliation to the professors or the university. This is a personal (Sanuja Senanayake) collection of images. The GPS reading are taken either from the built-in GPS locator in the camera or from field notes. I found that the location information can be highly inaccurate. One should not use the information on this page for any type of field work. The images are posted purely for entertainment.

Conglomerate

Location: 40°44’05.8″N 116°01’18.3″W
Elevation: 1478.70 m
Image direction: 100.73° (true direction)

Image: Click on the image for high resolution version.

Conglomerate formed by cyclothems.

Conglomerate formed by cyclothems.


Features: Conglomerate formed as a result of cyclothems.

Cross-bedding

Location: 40° 44′ 10.26″ N 116° 1′ 2.946″ W
Elevation: 1641.20 m
Image direction: 51.06° (true direction)

Image: Click on the image for high resolution version.

Crossbeds indicating marine environment.

Crossbeds indicating marine environment.


Features: Inclined layers with dipping indicating paleocurrents.

Paleosols

Location: 40° 44′ 6.678″ N 116° 1′ 9.48″ W
Elevation: 1653.70 m
Image direction: 66.78° (true direction)

Image: Click on the image for high resolution version.

Paleosols identified by roots and root traces.

Paleosols identified by roots and root traces.


Features: Roots and rootlets are indicative of paleosols. The Paleosols are formed under subareal exposure type environments.

Lava Rocks

Location: TBA
Elevation: TBA
Image direction: 2.05° (true direction)
Image: Click on the image for high resolution version.

Rocks formed by lava flows

Rocks formed by lava flows


Rocks formed by lava flows II

Rocks formed by lava flows II


Features: Ropy texture of this lava formation is indicative of pahoehoe lava.

Chert

Location: 40° 44′ 8.016″ N 116° 1′ 9.114″ W
Elevation: 1654.20 m
Image direction: 62.95° (true direction)

Image: Click on the image for high resolution version.

Chert sticking out of the outcrop.

Chert sticking out of the outcrop.


Chert at another location.
Chert bands sticking out of the outcrop.

Chert bands sticking out of the outcrop.


Features: Chert is more weather resistant than the outcrop surrounding them. Therefore it will stick out and easy to identify. Generally all cherts are harder than the surrounding Geologic material.

Contact between Formations

Location: 40° 43′ 46.764″ N 116° 1′ 0.006″ W
Elevation: 1663.10 m
Image direction: 89.70° (true direction)

Image: Click on the image for high resolution version.

Contact between two Formations.

Contact between two Formations.


Features: Different lithoologies will often have different weathering colours and patterns.

Misidentify a contact

Location: 40° 43′ 20.394″ N 116° 1′ 16.794″ W
Elevation: 1504.70 m
Image direction: 249.06° (true direction)

Image: Click on the image for high resolution version.

This looks like a contact, but it is not.

This looks like a contact, but it is not.


Features: This is not a contact but rather a fracture within the same formation. The difference in weathering colour may have been caused by the lower part being exposed to more fluid runoffs(?) from the fracture.

Fluvial Deposits

Location: TBA
Elevation: NA
Image direction: TBA
Image: Click on the image for high resolution version.

Fluvial deposits - Hoodoos

Fluvial deposits – Hoodoos


Features: Poorly sorted clasts from almost all Formations in the region. Lose sediments, friable and extremely poor bedding (almost no bedding). Formed as a result of weathering and erosion of other formations. May indicate a paleo river formation. Highly matrix supported with sandy size matrix particles.

Resistant (cliff forming) and Recessive

Location: 40° 43′ 40.8″ N 116° 1′ 10.1″ W
Elevation: NA
Image direction: 9.59° (true direction)

Image: Click on the image for high resolution version.

Formations : Resistant and (cliff) recessive outcrops.

Formations : Resistant and (cliff) recessive outcrops.


Features: Even from a distance we can interpret some Geological formations. In this example, we can say that at least two major formations based on the cliff forming and recessive units. Often Geologists scans the area before climbing to the outcrop of interest. In this picture we are about 1 km (or may be bit less) away from the outcrops shown.

Lose (non-outcrop type) Carbonate

Location: 40° 44′ 9.54″ N 116° 0′ 15.426″ W
Elevation: 1617.40 m
Image direction: 58.65° (true direction)

Image: Click on the image for high resolution version.

Lose sediments are an erosional feature.

Lose sediments are an erosional feature.


Features: Lose materials like these red carbonate pieces can be used to determine where the actual outcrop may be; up the slope!

Searching for outcrops like mountain goats

Location: 40° 43′ 3.3″ N 116° 0′ 9.306″ W
Elevation: 1569.70 m
Image direction: 167.06° (true direction)

Image: Click on the image for high resolution version.

Searching for outcrops.

Searching for outcrops.


Features: None that can be identified at this scale.

Miscellaneous

Chert in an unknown location (same area).

Chert in an unknown location (same area).

Crossbeds in an unknown location (same area).

Crossbeds in an unknown location (same area).

Permanent link to this article: http://sanuja.com/blog/pictures-from-field-school