Round Window -- Balanced Rock Trail, Big Bend NP TX
Posted by: Groundspeak Premium Member Benchmark Blasterz
N 29° 23.959 W 103° 12.154
13R E 674407 N 3253571
Quick Description: A small round window along the Balanced Rock Trail at Big Bend National Park
Location: Texas, United States
Date Posted: 1/30/2017 9:19:38 AM
Waymark Code: WMTZZJ
Published By: Groundspeak Premium Member bluesnote
Views: 1

Long Description:
This beautiful round window arch is located along the Balanced Rock trail to the famous Balanced Rock.

This fascinating geological area was created by a lava dome that split into boulders, some the size of houses and semi trailers, others the size of cars or suitcases.

This small window is formed by from a layer of sandstone (sedimentary rock) that was laid down over the lava dome, which later rose, cracking the surface of the earth and tumbling sandstone and granite boulders around..

A sign at the Grapevine Hills Trail (from which the Balanced Rock trail branches) reads as follows:

"GRAPEVINE HILLS TRAIL

The easy 2 mile round-trip trail follows a sandy wash through the jumble of boulders. After reaching a low pass, find a “window” of boulders by hiking another hundred yards along the ridge to the right.

This trail enters a realm of petrified fire. Here, under enormous pressure, a molten rock ballooned up beneath the earth surface. As erosion stripped away overlying layers the exposed domes fractured into a moonscape of giant boulders.

Grapevine Hills is a laccolith - a mushroom shaped intrusion of magma.

As the laccolith slowly cooled and hardened into granite, the overlying sedimentary layers began to wear away."
Photo of the Arch by itself?: yes

Type of Arch: Water Eroded

Type of Material:
A layer of sandstone rock over and old lava dome that has eroded, shattered, and formed the features in this trail


Visit Instructions:
You must post a picture of you with a GPSr or Geocaching/Waymarking attire/equipment and the subject arch in the background.
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Recent Visits/Logs:
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wb96bobwhite visited Round Window -- Balanced Rock Trail, Big Bend NP TX 3/14/2017 wb96bobwhite visited it
Benchmark Blasterz visited Round Window -- Balanced Rock Trail, Big Bend NP TX 12/25/2016 Benchmark Blasterz visited it

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