Northern truckee river and surrounding area field assignment

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Northern truckee river and surrounding area field assignment

  1. 1. ByCorey Volkmar
  2. 2.  I recently visited the northern part of the Truckee river and the surrounding area that included Amacker Ranch. This is a very beautiful area that demonstrates many geological aspects including varies rocks, plants, trees, and geological structures.
  3. 3.  Conglomerate rocks are a clastic sedimentary rock that contains large rounded particles (Geology.com). The space between the pebbles is generally filled with smaller particles and/or a chemical cement that binds the rock together (Geology). This rock looks to have formed from mechanical weathering debris as pebbles and sand combined together to create this rock.
  4. 4.  The Jeffrey pine is the dominant conifer in the Lake Tahoe basin (Macrae). “This species and ponderosa pine are the only Tahoe Basin pines that bear needles in bundles of three, and their length (up to 10″) and blue-green color also help to distinguish at a distance these two species from the other Tahoe Basin pines (Macrae).” This particular Jeffrey pine has experienced considerable weathering effects as seen by the almost branchless left side and branch heavy right side.
  5. 5.  In this portion of the Truckee River there is clear evidence that massive erosion has occurred. The bank on the left has eroded bank a considerable amount causing multiply trees(far side of bank) to fall into the river. This erosion has most likely occurred because of the force of the river but also due to the often harsh winter conditions.
  6. 6.  Granodiorite is a coarse-grained, intrusive igneous rock, similar to granite. It contains quartz and plagioclase feldspar (Geology.com). Granodiorites are extremely common in the Sierra Nevada Mountains along the Nevada-California Border(Geology.com).
  7. 7.  This is just a small part of the massive Sierra Nevada Mountains. This mountain ranged formed when the Pacific Ocean Plate was pushed under (subducted) the North American Plate(TIIMS). Glaciers, winter weather, and erosion have since formed the Sierra Nevada Mountains that we see today (TIIMS).
  8. 8.  (2005, January). In Geology.com: Rocks. Retrieved July 29, 2012, from http://geology.com/rocks/ Macrae, T. C. (2009, March 28). In Trees of Lake Tahoe-The Pines. Retrieved July 29, 2012, from https://beetlesinthebush.wordpress.com/2009/03/28/ trees-of-lake-tahoe-the-pines/ (2011, January). In TIIMS: Geology. Retrieved July 29, 2012, from http://eh2o.saic.com/tiimsWebsite/Content/BasinTop ics/geology/default.asp

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