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Aspen Area Mountain Lab II: Use your own answer sheet for this lab.
Station 1: Snowmass Mountain Quadrangle
1. Locate the cross-section A----A. Find the Elk Range
Thrust fault. What type of rock is on top of the fault
line? What type of rocks are laying underneath the fault
line?
2.
Compare the ages of the rocks overlying the fault
versus the rocks that were covered by the fault. What
do you notice about their ages?
3. In cross section B---B, what type of fold is found at the
Elk Range Thrust fault?
Station 2: Aspen Mine Prospects
1. Locate the map showing mine prospects for the Aspen
area. What does the pink color on the map indicate?
2. Compare this mining zone to the Aspen Geologic Map.
Along what geologic feature do these precious metals
occur, give the name?
Station 3: Snowmass Quadrangle
1. Find the topographic area of cross-section C---C.
Starting from the Southwest and walking Northeast
record the layers of rock you walk over. Start walking
from the South Fork of the Crystal (A) to the mountain
slope labeled (B). What do you notice about the layers,
what is the name of this geologic feature?
2. Using the Snowmass Quadrangle Map locate the crosssection C---C. What type of fold occurs here?
3. Hypothesize how this fold was created and name the
feature that created the fold?
Station 4: Carbondale Quadrangle
1. Using the Carbondale Quadrangle, find Mt. Sopris,
what is its elevation?
2. What type of rock does the summit Mt. Sopris consist
of?
3. What types of rock surround the base of Mt. Sopris?
4. How can you explain the summit rocks of Mt. Sopris
overlying the rocks of it’s slopes?
5. What kind of mountain is Mt. Sopris?
Station 5: Highland Peak Quadrangle
1. Using the Highland Peak Quadrangle map, locate Mt.
Baldy which is located in the Southwestern corner of
the map. Moving North, what type of feature are you
traveling over? *Hint: Cross-section D---D could be
helpful, read the surrounding topo lines.*
2. This type of feature is associated with what type of
mountain?
3. Locate the igneous intrusions for this quadrangle, what
type of rocks makes up these intrusions?
4. Using cross-section C---C, hypothesize why we have an
igneous layer in between two sedimentary layers?
Name this type of feature?
Station 6: Woody Creek Quadrangle.
1. Find where the letter “A” is marked on the map. Notice the pink layer of rock
(Qb). What type of geologic feature is made by this layer of rock?
2. What time period did the Qb rock form?