The Springs
Posted by: Groundspeak Premium Member Volcanoguy
N 44° 29.987 W 111° 15.331
12T E 479686 N 4927416
Quick Description: Geologic history sign at Big Springs.
Location: Idaho, United States
Date Posted: 8/16/2011 9:26:33 AM
Waymark Code: WMCAJC
Published By: Groundspeak Premium Member muddawber
Views: 3

Long Description:
This history sign is located at Big Springs and discusses the geologic history of Big Springs.
Marker Name: The Springs

Marker Type: Roadside

Marker Text:
Big Springs is located where the 1.3 million-year-old Henry’s Fork Caldera (a huge volcanic crater) is covered by the western edge of the more recent Buffalo Lake lava flow, which erupted from vents on the Yellowstone Plateau to the east. Geologists believe that the main source of the springs is the rain and snow that falls on the Yellowstone Plateau. This water percolates through the highly fractured lava until it meets less permeable glacial and lake sediments beneath the lava. This causes the water to spread laterally, emerging at the base of the Plateau as Big Springs, the largest of many springs that emerge along the western edge of the Yellowstone Plateau. Thermal waters from deeper sources may contribute to the springs’ flow and account for its year-round temperature of 52° F. This is slightly above the mean annual air temperature of the area.

County: Fremont

Group Responsible for Placement: U.S. Forest Service

City: Not listed

Date Dedicated: Not listed

Marker Number: Not listed

Web link(s) for additional information: Not listed

Visit Instructions:
In your log, please say if you learned something new, and if you took any extra time to explore the area once you stopped at the historic marker waymark. If possible please post a photo of you OR your GPS at the marker location. Also if you know of any additional links not already mentioned about this bit of Idaho history please include that in your log.

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Recent Visits/Logs:
Date Logged Log User Rating  
Volcanoguy visited The Springs 9/26/2010 Volcanoguy visited it