Golden Gate Photo - Newberry Volcanic Gallery
Fine Art Photography from Newberry National Volcanic Monument.


Newberry National Volcanic Monument covers over 50,000 acres (about 80 square miles) around the Newberry Caldera. The 4 to 5 mile wide caldera is the central crater of a shield volcano that covers 500 square miles (1,400 Km2), one of the largest volcanic areas in the continental United States. The thousands of eruptions that built the volcano began about 600,000 years ago. Over 400 cinder cones lie along the flanks of the volcano. A variety of volcanic rock and structure types have formed in the monument, including rhyolite domes, pumice rings, and obsidian flows. The most recent volcanic event was the Big Obsidian Flow 1,300 years ago.

Lava Butte

Lava Butte

Lava Butte is one of the most prominent volcanic vents in the monument, rising 500 feet (150 meters) above the surrounding lava flows. The crater is about 150 feet (45 meters) deep.

Print No. A99NW-19-5

Newberry Shield Volcano

Newberry Shield Volcano

Looking southeast, across the rims of Lava Butte, the mounded slope of the horizon is the profile of the Newberry Shield Volcano.

Print No. A99NW-19-4

Aa Flow

Aa Flow

Just below Lava Butte is a volcanic flow of aa basalt. Aa lava was more viscous and 'cooler' when it flowed. The result was a slow-moving blocky flow that solidified into a craggy terrain of sharp angular blocks. Aa is a Hawaiian word which may have originated from the mouths of the first people to walk across this rock.

Print No. A99NW-19-8

Lava Cast Forest

Lava Cast Forest

On the northwest flank of the Newberry Volcano lie the fossil remnants of the forest that stood there about 6,000 years ago. These remnants are the casts, formed by the pahoehoe (ropy) lava that encapsulated the base of the trees. Some casts are upright, indicating that the trees remained standing as the lava surrounded them. Others are horizontal where they either were already on their side or were bulldozed over by the advancing lava flow. The trees are long gone, but their imprint inside the casts is still visible.

Print No. A99NW-20-1

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