What is the latitude and longitude for these volcano's?

Question

Mt. Saint Helens

Diamond Head

Crater 160

Also, What type of volcano's are they?

What is the composition of lava/explosives?

What is the date of the last eruption?

Answer 1

Mt Saint Helens

Volcano types:                                  

    Stratovolcano

    Lava domes

Summit Elev: 2549 m

Latitude: 46.20°N

Longitude: 122.18°W

Prior to 1980, Mount St. Helens formed a conical, youthful volcano sometimes known as the Fuji-san of America. During the 1980 eruption the upper 400 m of the summit was removed by slope failure, leaving a 2 x 3.5 km horseshoe-shaped crater now partially filled by a lava dome. Mount St. Helens was formed during nine eruptive periods beginning about 40-50,000 years ago and has been the most active volcano in the Cascade Range during the Holocene. Prior to 2200 years ago, tephra, lava domes, and pyroclastic flows were erupted, forming the older St. Helens edifice, but few lava flows extended beyond the base of the volcano. The modern edifice was constructed during the last 2200 years, when the volcano produced basaltic as well as andesitic and dacitic products from summit and flank vents. Historical eruptions in the 19th century originated from the Goat Rocks area on the north flank, and were witnessed by early settlers.

Crater 160

Location: 35.5N, 111.6

Elevation: 6,232 feet (1,900 m)

Crater 160 is a composite cinder, tuff, and spatter cone. The cone is noted for the presence of ultramafic xenoliths. The cone has a three stage history. The initial eruption produced a build up of spatter on lava flows that are exposed in the bottom of the cone and in a d**e-like freature in the northeast wall of the crater. During the second stage the crater was deepened and widened and layers of tuff were deposited. The tuff contains the xenoliths. The final eruption was a fire fountain that produced the cinder cone. The cone is 100 feet (35 m) tall. Photo by Steve Mattox, 1989.

Diamond Head

Elevation 762 ft (232 m)

Location Hawaiʻi, USA

Range Hawaiian Islands

Coordinates 21°15′35.0″N, 157°48′42.3″W

Topo map USGS Honolulu

Type Volcanic cone

Age of rock 200,000 years

Easiest route follow the trail