Grand Teton National Park
Looking west toward Mount St. John, notice the steep slope or fault scarp near the base of the peak. This steep slope formed as several massive earthquakes broke the ground by more than 75 feet since the ice-aged glaciers last retreated 14,000 years ago. The Teton fault began moving roughly nine million years ago generating earthquakes that shook the landscape.Each earthquake, up to a magnitude 7.5, lifted the mountain block one part for every three to four parts that the valley block dropped building the range one step at a time. Future earthquakes will continue to shape this landscape but the geoscientists cannot predict when this will happen.An earthquake occurs when two blocks of the Earth's crust slip past one another along a crack called a fault. During larger earthquakes, the fault breaks the Earth's surface forming a vertical escarpment or scarp providing lasting evidence that an earthquake occurred. With time, erosion degrades the scarp leaving behind a more gentle slope.| HM Number | HM1NME |
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| Tags | |
| Placed By | National Park Service |
| Marker Condition | No reports yet |
| Date Added | Saturday, September 5th, 2015 at 9:01pm PDT -07:00 |
| UTM (WGS84 Datum) | 12T E 524408 N 4849028 |
|---|---|
| Decimal Degrees | 43.79391667, -110.69660000 |
| Degrees and Decimal Minutes | N 43° 47.635', W 110° 41.796' |
| Degrees, Minutes and Seconds | 43° 47' 38.1" N, 110° 41' 47.76" W |
| Driving Directions | Google Maps |
| Area Code(s) | 307 |
| Which side of the road? | Marker is on the right when traveling South |
| Closest Postal Address | At or near Teton Park Rd, Moose WY 83012, US |
| Alternative Maps | Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap |
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