Hell's Half Acre Lava Field
- Hell's Half Acre Lava Field
Infobox Mountain
Name=Half Acre Lava Field
Photo= Hells Half Acre.jpg
Caption= Hells Half Acre, Idaho, USA
Elevation= convert|1631|m|ft|0|abbr=on
Location=Idaho, USA
Range=
Prominence =
Coordinates = coord|43.50|N|112.45|W|type:mountain_region:ID
Topographic
Type= Shield volcano[VNUM|1=1204-04-|2=Hell's Half Acreaccessdate|2008-08-21] ]
Volcanic_Arc/Belt=
Age=
Last eruption= 3250 BC ± 150 years
First ascent=
Easiest route=
Hell's Half Acre lava field, is the youngest of the eastern basaltic lava fields of the Snake River Plain, Idaho, USA.
Hell's Half Acre covers an area of about convert|400|km2|sqmi|sigfig=2|abbr=on of Bingham County and Bonneville County it is south-west of Idaho Falls. The field is the second largest of the Snake River Plain fields. The lava is basaltic in nature which formed a broad, low shield volcano with dominantly pahoehoe flows that were erupted from a convert|3|km|mi|1|sp=us|adj=on long, north-west to south-east trending vent system at the north-west part of the field during a brief eruptive episode about 5,200 years ago. Interstate 15 crosses the south-east edge of the lava field south-west of the city of Idaho Falls. Hell's Half Acre lava field is a National Natural Landmark.
References
* http://www.blm.gov/id/st/en/fo/upper_snake/recreation_sites_/Hell_s_Half_Acre_Lava_Trail.html
* http://www.nps.gov/ccso/nnl/nnli.htm
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