Over millions of years many volcanic eruptions have deposited tons of volcanic rock and minerals in the Fall River Valley and surrounding areas. One of the more common types of rock is Scoria.
Scoria is a volcanic rock that has lots of holes or vesicles. It is usually dark in color, and andesitic or basaltic in texture.
Basalt is a common extrusive volcanic rock. It is usually grey to black and fine-grained due to rapid cooling of lava at the surface of the earth.
Andesite is an extrusive igneous, volcanic rock. With dark color and smooth texture. It is usually dark brown to red.
Scoria is kinda light because of lots of macroscopic ellipsoidal vesicles, but in contrast to pumice, all scoria has a specific gravity greater than 1, and sinks in water. The holes or vesicules form when gases that were in the magma create bubbles in the molten rock, some of which are frozen in place as the lava cools down and becomes a rock. Scoria may form as part of a lava flow, usually near its surface. Most scoria is made up of glassy fragments.
In order to log this Earthcache as found, Please send me an E-Mail answering the following.
LOGGING REQUIREMENTS...
1. How Many people in your group?
2. How tall is the Scoria Face?
3. Based on your reading, Is it andesitic or basaltic?
4. What is the texture of the Scoria beneath your feet?
5. (optional) Post a pic of yourself in the area. Try not to give away to much in the pic.
Found It! logs without me recieving the required answers will result in your log being deleted.
