Hell's Half Acre Lava Field

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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 400 km² 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 3-km-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. The Interstate 15 highway 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.

[edit] References

• Smithsonian Institution Global Volcanism Program: Hell's Half Acre
• http://imnh.isu.edu/digitalatlas/geo/greatrft/grztext/grzmain.htm
• 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