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Log Book for March 1, 2004
Geology Report
Ryan Kobrick Reporting

Summary: Today's EVA mission went to Kent's reservoir at 12S 0518444E 4252964N. The EVA crew walked from the Hab to this location, which had a straight-line distance of 2 km. On the EVA we made frequent stops searching for different rock samples to be analyzed with the collaboration of the RST. Today's mission was a refresher of rock formation types since my first year undergraduate course in Geology was six years ago and with Dennis' expertise is in Marine Biology and not geology. The samples were photographed up close in the field with a ruler, and the locations were recorded with the GPS. Since the walk to the main EVA target is about 3 km, the crew felt it would be best to take interesting samples along the entire route since all of the terrain was new. Also a 360° panoramic image was taken of the reservoir area with Due North at the right side of the image. The main focus of this EVA was to develop standard protocols between the Remote Science Team (RST) and the crew. This report is divided between two parts for the two days and has a progression in development of the protocol. The next report to be written (March 4th) has used this knowledge to develop a standard report.

The following is a list of the nine samples we collected in chronological order with our best primary educated guesses of rock type. The identification process will be further determined with the RST including microscopic imaging where necessary at a future date (no microscope images were taken as of yet).


Sample 1 - 12S 0518829E 4252649N

Description: Layered sample with white layered inclusion; outer layers are black and red. Found on the roadside East of Lowell Highway.

Rationale for Collection: The rock was extremely out of place with its surroundings by the road. Its scientific value was established because we felt the layering would help with understanding the local geological processes.

Hypothesis: Metamorphic?

Further Testing: None.
Sample 01 - 12S 0518829E 4252649N

Sample 10 - 12S 0513529E 4252923N

Description: Grey and brown grain intertwined and non-regular angles. Located South and uphill of reservoir. Sample had to be crumbled off rock face using hands.

Rationale for Collection: Near key location and it is representative of the rocks in the area especially under the topsoil.

Hypothesis: Metamorphic?

Further Testing: None.
Sample 10 - 12S 0513529E 4252923N

Sample 2 - 12S 0518517E 4252896N

Description: "Green" slate in overhang to reservoir. Found on ground, broken off wall, which was a geological timeline of the lake and area. Layers of walls were fractured in a diagonal direction but not from large uplifting (no visible displacements next to fracture). An additional image was taken of the outcrop area from which the sample originated.

Rationale for Collection: In key area and in outcrop, which showed significant layering of the reservoir area.

Hypothesis: Green slate. Metamorphic.

Further Testing: None.

Sample 02 - 12S 0518517E 4252896N
Utah's geological history in Kent's Reservoir    Amy exits a cave by the reservoir
Sample 2 Outcrop: Sample from middle of outcrop (facing North
approximately in cavern overhang at reservoir as seen in second picture)

Sample 09 - 12S 0518583E 4252807N

Description: White quartz center with large grains approximately 1 cm in height and 0.5 across. The quartz is surrounding by an orange layer and then outer black and white shell, a possible geode. The sample is of a small rock, which was cracked in half and both halves were recovered in the field near the flat pebble plain near the highway.

Rationale for Collection: Quartz crystals were present in area and this sample was cracked revealing the interior structure.

Hypothesis: Metamorphic.

Further Testing: None.
Sample 09 - 12S 0518583E 4252807N

Sample 03 - 12S 0518604E 4252788N

Description: Sandstone located in a possible outwash area that flows into Kent's Reservoir. Fine compressed grain with blackish exterior but light brown interior. Mini sledge used to crack sample since rock hammer test failed.

Rationale for Collection: A common piece of sandstone and we felt we needed to collect at least one.

Hypothesis: Sedimentary.

Further Testing: None.
Sample 03 - 12S 0518604E 4252788N

Sample 04 - 12S 0518618E 4252766N

Description: Conglomerate located in a possible outwash area that flows into Kent's Reservoir. Comprised of multiple minerals ranging from 1-5 mm. Definitely caused from previous water flow in area.

Rationale for Collection: Typical conglomerate in area, which shows the composition of minerals flowing in the wet seasons in Utah.

Hypothesis: Sedimentary.

Further Testing: None.
Sample 04 - 12S 0518618E 4252766N

Sample 05 - 12S 0518987E 4252353N

Description: Average granule 4 mm. Light blue tint.

Rationale for collection: Picked up on side of road because it looked familiar to a shell. It caught our eyes and look like it could be identified with further help with the RST.

Hypothesis: Possible biogenic or quartz mineral.

Further Testing: None.
Sample 05 - 12S 0518987E 4252353N

Sample 06 - 12S 0518916E 4251601N

Description: Obsidian with one smooth black side and the other not as smooth but dark brown. It was found near the pebble area near the East side of the roadway taken to reservoir.

Rationale for Collection: Looked like it could have come from a lava flow and the material was extremely common in the pebble bed.

Hypothesis: Igneous.

Further Testing: None.
Sample 06 - 12S 0518916E 4251601N

Sample 07 - 12S 0518876E 4251556N

Description: Found on Lowell Highway. Oval in circumference with many small inclusions. Reddish Brown exterior.

Rationale for Collection: "This looks like a big piece of beef jerky". Very interesting and rare sample that we thought was pretty, ugly.

Hypothesis: Unknown. Petrified wood?

Further Testing: None.
Sample 07 - 12S 0518876E 4251556N

Map of Walk:

The data points are difficult to see in this image so an arc is drawn in with the Hab in the lower part of the image and the upper location is Kent's Reservoir. The extra dot near the center of radius is from EVA-0 on top of a hill with an interesting rock collection, which looks like a skeleton.
Aerial Photo Map with Route


Recommendations: A new chart in the HAB of Utah's mineral and rock types would be very helpful for classification of samples especially for crewmembers without a geological background. A small collection of textbooks (available in Hab) and identified samples already taken from the field would also be helpful. A collection procedure is being developed and will need to be refined with experience. This procedure should be easily understood by any EVA crewmembers with varying geologic backgrounds. Since we are not trained geologists we cannot properly classify the rocks (yet) but we were able to determine which samples would be most useful for further analysis by using the powerful ability of human intuition. Also a sample return plate or storage system would be helpful for keeping the samples organized and preserved. When doing work in the lab a further picture of the sample should be taken to properly show the size of the sample in a clear picture. This was part of the original directions but missed in this report.

Closing Day Thoughts: The use of humans for rock sample collection in the field is underestimated. The places to which rovers cannot venture are usually the most critical. Today we climbed down a steep incline and investigated an overhang; almost cave, from the lake level. A rover would not be able to traverse this terrain and view the most interesting area of the entire EVA. In this location we observed how the layers revealed the geological time of the area. Also at one point in the EVA we had all three crewmembers find samples since they were looking in different directions and two of which were collected. During the walking on this EVA to the reservoir, it was reminiscent of walking along a beach and collecting interesting shells. In the EVA we walked approximately 6 km observing the land and area in just over three hours. A rover would never be able to do this, come home and write a report, and then do it all again tomorrow.

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