Marble Mountain-Trout Creek Hill volcanic field (MMTC) is a volcanic field

Volcanic field

A volcanic field is an area of the Earth's crust that is prone to localized volcanic activity. They usually contain 10 to 100 volcanoes, such as cinder cones and are usually in clusters. Lava flows may also occur...

 located in Washington, USA.

Notable Vents

Name	Elevation	Coordinates	Last eruption
Bare Mountain Bare Mountain Bare Mountain may refer to:* Bare Mountain , a mountain in the Holyoke Range of Massachusetts* Bare Mountain , a mountain range in Nye County, Nevada...	-	-	-
Marble Mountain Marble Mountain -Mountains:* Marble Mountains , Vietnam* Marble Mountains in California, USA* Marble Mountains in California, USA* Marble Mountain in Newfoundland, Canada-Communities:...	1258 m or 4,127 ft	-	-
Trout Creek Hill Trout Creek Hill Trout Creek Hill is a small Pleistocene basaltic shield volcano in Washington, United States. It produced a lava flow about 340,000 years ago that traveled southeast, which dammed the Columbia River for a short period of time....	893 m or 2,930 ft	45°49′N 122°00′W	~340,000 years ago
West Crater West Crater West Crater is a small andesitic lava dome with associated lava flows in southern Washington, USA....	1329 m or 4,360 ft	45.88°N 122.08°W	5750 BC?

Trout Creek Hill

Trout Creek Hill is a small Pleistocene

Pleistocene

The Pleistocene is the epoch from 2,588,000 to 11,700 years BP that spans the world's recent period of repeated glaciations. The name pleistocene is derived from the Greek and ....

 basalt

Basalt

Basalt is a common extrusive volcanic rock. It is usually grey to black and fine-grained due to rapid cooling of lava at the surface of a planet. It may be porphyritic containing larger crystals in a fine matrix, or vesicular, or frothy scoria. Unweathered basalt is black or grey...

ic shield volcano

Shield volcano

A shield volcano is a type of volcano usually built almost entirely of fluid lava flows. They are named for their large size and low profile, resembling a warrior's shield. This is caused by the highly fluid lava they erupt, which travels farther than lava erupted from more explosive volcanoes...

 in Washington, United States. It produced a lava flow about 340,000 years ago that traveled 20 km (12 mi) southeast, which dammed the Columbia River

Columbia River

The Columbia River is the largest river in the Pacific Northwest region of North America. The river rises in the Rocky Mountains of British Columbia, Canada, flows northwest and then south into the U.S. state of Washington, then turns west to form most of the border between Washington and the state...

 for a short period of time.

West Crater

West Crater is a small andesitic

Andesite

Andesite is an extrusive igneous, volcanic rock, of intermediate composition, with aphanitic to porphyritic texture. In a general sense, it is the intermediate type between basalt and dacite. The mineral assemblage is typically dominated by plagioclase plus pyroxene and/or hornblende. Magnetite,...

 lava dome

Lava dome

|250px|thumb|right|Image of the [[rhyolitic]] lava dome of [[Chaitén Volcano]] during its 2008–2009 eruption.In volcanology, a lava dome is a roughly circular mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano...

 with associated lava flows in southern Washington.