BRP 290.4 Thunder Hill Overlook EarthCache

This cache has been archived.

rainbowtree: DO NOT post a log to this cache.
If you choose to disregard CO's request and log this archived cache, be sure you have the following ...
1. Pics at the required coordinates with you or your signature item as verification of visit.
2. All questions completely/thoughtfully answered.
A special thank you to those who completed all the requirements as requested -and- added the Journeys to your log.
Location and content gifted to a special cacher for development of a new EarthCache.

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Hidden : 6/1/2017
Difficulty:
1.5 out of 5
Terrain:
1.5 out of 5

Size: Size: other (other)

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Geocache Description:

BLUE RIDGE PARKWAY OVERLOOKS GEOLOGY TOUR
There are countless wonders to behold along your journey.
Posted coordinates are for parking. - Outcrops are within 100 feet.

EARTHCACHE REQUIREMENTS
Each cacher must send his/her own answers BEFORE logging a find. Enjoy the journey (learning adventure) as well as the destination (smiley earned). Remember to take only pictures and leave only footprints. To get credit for this Earthcache, complete the following tasks:

1. MESSAGE …. a. Based on the reading, what is augen gneiss? ... b. Based on your observations, what word would you use to describe it differently? Explain.

2. MESSAGE …. Observe the white feldspar crystals in the rock. ... a. What is the largest size of these crystals embedded here? ... b. Due to differential erosion of the crystals and the matrix, how far into or above do the crystals extend.

3. LOG …. Post a picture at or near the coordinates. This picture is your log signature.

OPTIONAL - Please respect the time and effort involved in finding and creating this earthcache by adding A and B to your log.

A. JOURNEY OF THE MIND ... Science explains what we observe. Relate (in your own words) something you found interesting in the reading. This adds to your learning adventure and your log.

B. JOURNEY OF THE HEART ... Art shares our personal experience of what we see. Share something special you found on site, and why it is special to you. This is a memorable addition to your log and will make other hearts smile.

THANK YOU Mark W. Carter for permission to use your book for this earthcache.
THANK YOU Lillian for permission to place this earthcache along the Blue Ridge Parkway.


OUTCROP
You are observing Blowing Rock Gneiss. This rock type is called an "augen" gneiss because of its large white feldspar crystals that are surrounded by a dark-colored, fine-grained mineral matrix. Augen is the German word for "eyes", which these feldspar crystals resemble. The matrix consists mostly of biotite mica and green epidote. The feldspar crystals stand out from the matrix because of differential erosion of the minerals within the rock.



RESOURCE
A Geologic Adventure Along The Blue Ridge Parkway in North Carolina by Carter/Merschat/Wilson ... 2001

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