Advanced Field Geology Mapping at the Sinks, 2003: writeup instructions
By 5 pm on May 8, please turn in to Ramon the following:
1) Your neatly drafted geologic map. You can find clean basemaps in our lab in PSF475 on the drafting table or download a tiff from here: sinks.tif (30 Mb)
2) A sketch of your idealized sequence of sink development, both in map and cross-section views.
3) A narrative of no more than 5 pages addressing these questions (provide an introduction and a brief statement of methods):
- Describe the geologic mapping that you did including the major rock units
- Describe the map pattern of sinks and intervening geology and structures. Consider both geology and geomorphology.
- Describe the relationships in time, space, and process between the sinks, small scale fractures, intermediate scale "tent-structures" and faults/fractures, and the major monocline.
- Are these features actively forming? What evidence is there for their activity?
- Narrate your sketch in 2), describing your model for sink development based on the observations we made in the area.
The Permian salt is/was about 100 m thick and its top is <300 m below the surface in the area where we mapped (Rauzi and Fellows, 2003, Holbrook Basin: Correlation and resources, Arizona Geology, v. 33, no. 2, p. 3-5, 2003).
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May 1, 2003