Canyon Granite
A
cache
by G&Jcaching
Hidden
:
6/5/2007
Difficulty:
Terrain:
Size: 
(Not chosen)
You must be logged in with a Geocaching.com account to view the specific location of this geocache. It's free!
Plenty of room to park and take a short walk to this site.
Millions of years ago, deep in the Earth, molten rock moved into
this area. Here it cooled and solidified into the rock type that
geologists call granite. This site is a great location to see some
granite up close and personal!
The granite at this location contains many of the very common rock
forming minerals - quartz (grey glassy mineral), feldspar (white
and pink minerals) and mica (flakey black). If you look at a
freshly broken piece of granite, you should be able to identify
these minerals.
As this granite cooled, it also incorportaed some chunks of the
surrounding country rock into the melt. These pieces are 'cooked'
up, but did not melt, and form dark blobs of rock material within
the granite. Geologists call these dark blobs Xenoliths.
From this point you can also see some historical remnants of the
railroad that ran up this canyon to service the mines higher up.
Can you find the remains of the railroad bridge? The pylons are not
made of this granite, but of a hard sandstone found close by.
To log this EarthCache you have to find the largest Xenolith you
can see from this point. Estimate its largest dimension (length and
width) and email your enswer to us. Then log a picture of you at
the site, including the number of people in your group in the
log.
Logs without a confirmation email will be deleted.
Additional Hints
(No hints available.)
Find...
Loading Cache Logs...
|
Current Time:
Last Updated: on 10/24/2011 8:28:00 AM Pacific Daylight Time (3:28 PM GMT)
Rendered From:Unknown
Coordinates are in the WGS84 datum
