Jamestown Quarry EarthCache
Troutpro: After careful consideration, I have decided to archive this cache as the viewpoints that were available when I placed it are no longer functional. Thanks to all who visited over the years.
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This earthcache highlights how man extracts the minerals he needs from the earth using geology.
The posted coordinates should take you to a public roadside turnout next to an abandoned open pit mine. Open pit mining is a term used to describe mining on the surface of the earth without tunnels. It is basically the process of digging a pit. The mines are used to extract just about every useful mineral from the earth and mines just keep growing until either the material plays out or the mine is deemed uneconomic. Because of the mine at this coordinates, we can have a glimpse of the past here.
About 130 MYA the Sierra Nevada Mountains started to be pushed up by fault action. The faults caused volcanoes to form and this further expanded the mountains. however, before that the sierras were part of the bottom of the pacific ocean and the central valley, which gave it a sedimentary bottom. The Sierras added layers of both metamorphic and igneous rocks on top of these. This layering now forms some of the bedrock here. Sedimentary rocks are a light brown or beige color and metamorphic and igneous rocks are dark.
To get credit for this earthcache go to the posted coordinates and email me the answers to the following questions:
1. The GC code and name of this cache.
2. The nuber of people in your group.
3. What has the mine been put to use as now?
4. Are the bedrock sediments visible?
5. If so, what olor are they?
6. Then, what part of the bedrock are you looking at?
Additional Hints
(No hints available.)
Treasures
You'll collect a digital Treasure from one of these collections when you find and log this geocache:
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