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Sand Mountain volcano

cinder cones 1664 m / 5,459 ft
Oregon, USA (mainland exept Alaska), 44.38°N / -121.93°W
Current status: dormant (1 out of 5)
Typical eruption style: Explosive
Sand Mountain volcano eruptions: 70 AD ± 150, 800 BC ±300, 900 BC ± 100, 1740 BC ± 300, 2290 BC ± 300 (all radiocarbon dated)
Sand Mountain Volcano Photos

Last earthquakes nearby: No recent earthquakes
TimeMag. / DepthDistanceLocation
Sand Mountain is a cluster of 23 cinder cones NW of Mt Washington, Oregon. The youngest eruption took place to form Lost Lake cinder cone at the north end of the chain about 2000 years ago.

Background:

Most of the 23 basaltic and basaltic-andesite cinder cones of Sand Mountain volcanic field are aligned along a N-S trending line immediately west of the Cascade crest NW of Mount Washington. A secondary trend of alignment in NNW and NNE direction intersects the N-S line near the largest cinder cone, Sand Mountain.
Geologically young lava flows from vents on the western side were erupted between 3000-4000 years ago. The lava flows traveled mostly to the west, blocking local drainages and forming several small lakes.
Source: GVP

Sand Mountain Photos:

Green weathered sandstone in the Geralta mountains in northern Ethiopia. (Photo: Tom Pfeiffer)
Green weathered sandstone in the Geralta mountains in northern Ethiopia. (Photo: Tom Pfeiffer)
 Kawah Ratu - Mt. Tangkuban Perahu, West Java, Indonesia Mt. Tangkuban Perahu is Bandung's most famous volcano just 28 km north of the city. This volcano has a distinctive shape, like an upside down boat (Tangkuban Perahu means, in fact, "up-turned boat"), it has three craters into which areas tourists can walk through. These three craters are: Kawah Ratu, Kawah Domas and Kawah Upas. Kawah Ratu, which means "Queen's Crater", is today just a big gray hole, which sometimes has a pool of water at its center. Poisonous gases sometimes accumulate in Kawah Ratu, thus making it somewhat of a risk to descend to the crater floor. Beyond the saddled shaped depression on the far side of Kawah Ratu is the still active Kawah Upas, the oldest crater on the mountain. On the very far western cliff we see a spot where all vegetation has been destroyed by constantly rising sulfurous vapors. On the crater walls, note the various layers of material consisting of rock, sand, and pebbles. Overtime, new craters have formed again and again in a rather consistent shift from west to east. (Photo: JessyEykendorp)
Kawah Ratu - Mt. Tangkuban Perahu, West Java, Indonesia

Mt. Tangkuban Perahu is Bandung's most famous volcano just 28 km north of the city. This volcano has a ...
 Pravčická brána, Europe's largest natural sandstone arch, and in the background Rùžovský vrch, an ancient extinct basaltic volcano and the highest mountain (619 m) in the Bohemian Switzerland east of the River Elbe in the Czech Republic (Photo: Janka)
Pravčická brána, Europe's largest natural sandstone arch, and in the background Rùžovský vrch, an ancient extinct basaltic volcano and the highest mountain (619 m) in the...
Only the shape of Rùžovský vrch in the Elbe Sandstone Mountains reminds of its past as being an active volcano during the Tertiary period. (Photo: Janka)
Only the shape of Rùžovský vrch in the Elbe Sandstone Mountains reminds of its past as being an active volcano during the Tertiary period. (Photo: Janka)
 2050 m a.s.l. We're back in the highlands. Isolated sandstone table mountains dominate the landscape. (Photo: Tom Pfeiffer)
2050 m a.s.l. We're back in the highlands. Isolated sandstone table mountains dominate the landscape. (Photo: Tom Pfeiffer)
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