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It's hard to tell but this is a very long crack that goes to the top of the photo.
The site is about 150 square miles in size. The area where a former lava lake existed is marked by a 875-yard long by 328-yard wide depression near the summit of the lava field. Ten circular pits and two large lava tubes are also located near the summit.
Two major lava flows, each about 6.2 miles long by 3.1 miles wide, extend from the main lava field to the south and southwest. These two lava flows surround "Morgans Pasture," a kipuka (or older geologic feature which was not covered by lava).
More recently, scientists studying aerial photographs of the site discovered a 328-yard long eruptive fissure partly buried under lava flows just 437 yards from the northwest boundary of the lava field. This and other features of the site indicate that the fissure vent itself may be 11.8 miles long
The site is about 150 square miles in size. The area where a former lava lake existed is marked by a 875-yard long by 328-yard wide depression near the summit of the lava field. Ten circular pits and two large lava tubes are also located near the summit.
Two major lava flows, each about 6.2 miles long by 3.1 miles wide, extend from the main lava field to the south and southwest. These two lava flows surround "Morgans Pasture," a kipuka (or older geologic feature which was not covered by lava).
More recently, scientists studying aerial photographs of the site discovered a 328-yard long eruptive fissure partly buried under lava flows just 437 yards from the northwest boundary of the lava field. This and other features of the site indicate that the fissure vent itself may be 11.8 miles long