Need 1 through 3 lty . Sediment from Source to Sink Name: Course/Section Date: A
ID: 120203 • Letter: N
Question
Need 1 through 3
lty . Sediment from Source to Sink Name: Course/Section Date: A Look at Fig. A6.2.1. A rockfall from one of the steep granitic walls of Yosemite Valley (A) caused boulders as large as 2 meters in diameter to crash down into the forested slope below Eventually, these sediments might end up in the steep channel of a local stream (C) on their way to the Merced River (D), which flows through the main part of Yosemite Valley rockfall deposit -200 m -9 km Figure A6.2.1 1. Rockfall deposit close to the source area (Photo B refer to Fig. 6.2). The largest sediment grain in B is approximately 2 meters long. Use the grain-size class names listed in Fig. 6.15. (a) List all of the grain sizes that you see or that are likely to be present in the rockfall deposit shown in photo B (also 170Explanation / Answer
Rockfall deposits close to the source area.( photo B)
1 A) As the sediment grain size is above 2 meters. So, in the figure 6.2 B, the name of grain size class is Boulder.
B) Another sediment property that can be detected by the texture of the rock is the grain shape. Whether particles in the sediment are rounded or angular is determined by the amount of abrasion the particles have undergone. The grain shape in figure 6.2 B is angular.
C) If those sediments are lithified, then it forms Boulder conglomerate.
Tibutary stream just downslope from rockfall deposits (Photo C)
2.A) As the sediment grain size is less than ~1.5 meters in diameters. So, in the figure 6.2 C, the name of grain size class is Cobbles which are carried by rolling, sliding, or rest at the bottom of the sediments. As the velocity of river is more high, so the lower size sediments (Pabble, granule) are found in suspension.
B) So, in the figure 6.2 C, the name of grain size class is Cobbles which are carried by rolling, sliding, or rest at the bottom of the sediments.
C) Another sediment property that can be detected by the texture of the rock is the grain shape. Whether particles in the sediment are rounded or angular is determined by the amount of abrasion the particles have undergone. The grain shape in figure 6.2 C is subangular.
3) River deposits exposed in the eroded bank of Merced River (Photo D)
3. A) The sediment grain size in the figure 6.2 D, the name of grain size class is Pabbles or Granules.
B) Sorting is a term usually applied to sediments or sedimentary rock, and describes the degree of uniformity of grain size. The degree of sorting depends upon how much transport the sediment has undergone. In the picture 6.2.D, the sorting is subrounded moderately sorting.
C) Another sediment property that can be detected by the texture of the rock is the grain shape. Whether particles in the sediment are rounded or angular is determined by the amount of abrasion the particles have undergone. The grain shape in figure 6.2 D is subangular to subrounded.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.