> Eva Report
> 04/09/2013
> Paulina Sidwell
> Eva Number:
> 3
> Eva Date:
> 04/09/2013
> Time Slot:
> laterAM
> Purpose:
> This was our Geology EVA. The main purpose of this EVA was to expose the students to geology field work. The main objectives were to learn about the characteristics of the solid and geologic structures on the ground. Some of the specific features we were looking for were clast size, depositional environments, strike and dip, potential fluvial environments, and soil samples for later analysis.
> Narrative:
> Larry, Randy and I left around 9:30 a.m. It was cooler today than it had been since we got here, so we made sure to bundle up underneath our space suits. We headed towards out first stop, where we talked about sedimentary rocks, regolith, depositional environments and different clast size categories. We took samples of the sandstone and measured some structures for classification. Then we walked over to our next spot (about 50 yards away). There we studied a specific, interesting structure (hoodoo) and talked about the depositional environment, clast size, and took a sample. We also measure its strike and dip (to illustrate the use of a Brunton compass). After we were done, we walked back to the ATVs and headed back to the hab because we forgot the ziploc bags (necessary for the next stop). After we compressed and decompressed, we left to go to the third stop. We parked the ATVs next to the road and then walked about to the little canyon area. There we talked about the outcrops, fluvian environments, took some measurements and collected some soil samples for later analysis. After we finished our activities, we walked back to the ATVs and went back to the hab.
> Eva Depart Time:
> 9:30
> Check In Time One:
> 9:45
> Check In One E:
> 518589E
> Check In One N:
> 4248926N
> Check In Note One:
>
> Check In Time Two:
> 10:10
> Check In East Two:
> 518558E
> Check In Note Two:
>
> Check In Time Three:
> 11:05
> Check In East Three:
> 518230E
> Check In North Three:
> 4250725N
> Check In Note Three:
>
> Check In Time Four:
> 11:20
> Check In East Four:
> 519299E
> Check In North Four:
> 4251285N
> Check In Note Four:
>
> Eva Return Time:
> 12:25
> Wp1 E:
> 518589E
> Wp1 N:
> 4248926N
> Waypoint1arrive Time:
> 9:45
> Eva W P1depart Time:
> 10:05
> Wp1 Find:
> We found sandstones in different sizes, they had holes that were probably caused by slightly acidic groundwater springs or wind abrasion. Also, these rocks have a white coating which is most likely a mineral, may have been the reducing material.
> Wp2 E:
> 518558E
> Wp2 N:
> 4248842N
> Eva W P2arrive Time:
> 10:10
> Eva W P2depart Time:
> 10:45
> Wp2 Find:
> While analyzing the strange structure, we came to the conclusion that this structure is made of sandstone and that is was deposited in an eolian environment based on the clast size and the lack of roundness in the grains.
> Wp3 E:
> 519299E
> Wp3 N:
> 4251285N
> Eva W P3arrive Time:
> 11:20
> Eva W P3depart Time:
> 12:00
> Wp3 Find:
> This small canyon shows that at some point there must have been a fluvial environment based on the shape and position of the outcrops. From the soil samples we found that the soil type is loamy sand (mostly sand, some clay, low in silt).