There are many of these granite type rocks in the area. The river bed is covered with many granodiorite rocks which are like granite but have less potasium feldspar and more plagioclase feldspar than granite. Granite is a light colored coarse grained igneous rock with much quarts and feldspar in it most also contain mica or amphibole. It has large grains that are easy to see with the naked eye. Granitic rocks are similar to granite but metamorphism and weathering gives them a brownish appearance. granite has large grains that are easy to see with the naked eye..Many huge granite rocks fill the river channel near the bridge.
You are looking for a rock that is about six feet from the ground nestled into some other rocks. It has striations of white, black and grey running its length. It also has some very distinct black rocks ithat were intruded into the older granite. There is a white stripe of quartz running across the rock.
To claim this cache as a find please email (NOT the message center) me the answers to these questions:
1. Name of the cache, the number and names of those with you.
2. How wide is the white stripe of quartz? Does it feel different than the main rock and how different? rough, smooth, crystals: large, medium, small.
3. How many pieces of the black intrusion material are on the flat surface of the rock? What is the lenght and width of the largest one of these? How does it feel compared to the white stripe and the main body of the rock?