BRP 329.8 Table Rock Mountain 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This cache has been archived.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 …. What type of erosion created this formation?

2. MESSAGE …. What type of fault created this formation?

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.


WEATHERING (Breaking Down) and EROSION (Carrying Away)

WEATHERING is the breaking down of rock into smaller fragments. All rock weathers over time. Grains of sediment fall out. Cracks develop on the surface and deep inside. Weathering causes rocks to fracture, buckle, and crumble into soil and sediment. There are two types of weathering - mechanical and chemical.

MECHANICAL WEATHERING breaks apart rocks without changing their chemical composition. Each fragment and particle weathered away by a mechanical process retains the same characteristics as the original rock. Mechanical weathering can be caused by growing plants, expanding ice, lightning, and expansion and contraction with heating and cooling. These physical processes create enough force to break rocks into smaller pieces.
Biological Weathering - Frost disintegration - Hydraulic action - Pressure release - Salt-crystal growth (haloclasty) - Thermal expansion

CHEMICAL WEATHERING occurs when water, air, and other substances react with the minerals in rock. In chemical weathering, the composition of the rock changes.
Carbonation – Dissolution – Hydration – Hydrolysis - Oxidation - Ion exchange in solution

EROSION is the movement of weathered materials by water, wind, ice, and gravity.
Gravity erosion - Ice erosion - Shoreline erosion - Water erosion - Wind erosion

DIFFERENTIAL EROSION is caused by the differences in the resistance and hardness of surface materials. Softer and weaker rocks are rapidly worn away, whereas harder and more resistant rocks remain to form ridges, hills, or mountains. Unusual formations and remnants are often the result of differential erosion.

FAULTS (Break in the Earth's Crust)


NORMAL FAULT - Movement is downward caused by tension where two blocks of rock are pulled apart.

REVERSE FAULT - Movement is upward caused by compression.

LATERAL FAULT - Movement is forward caused by horizontal compression.

OBLIQUE FAULT - Movement is at an angle caused by a combination of shearing and compression.

THRUST FAULT - Movement where lower strata are pushed up and over higher strata caused by compression. They often place older rocks above younger.

OVERLOOK

Table Rock Mountain is an erosional remnant created during Alleghanian mountain-building. A fault resulted in quartzite (hardness7) rocks of the Chilhowee Group underlain by biotite granitic gneiss (hardness less than 7).

RESOURCES
A Geologic Adventure Along The Blue Ridge Parkway in North Carolina by Carter/Merschat/Wilson ... 2001
http://carolinabeachsurfreport.com/study/types-of-faults-worksheet.html

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