The Sonoma Volcanics are a geologic formation of volcanic origin that is widespread in Napa and Sonoma counties, California. Most of the formation is Pliocene...

area was attended by volcanism (Late Miocene Tolay Volcanics and Late Miocene - Pliocene Sonoma Volcanics) which are interbedded with the late Miocene-Pliocene...

Sonoma (/səˈnoʊmə/) is a city in Sonoma County, California, United States, located in the North Bay region of the San Francisco Bay Area. Sonoma is one...

of the Howell Mountains is a geologic formation of volcanic origin known as the Sonoma Volcanics, older sedimentary rocks of the Cretaceous age Great...

Canada Smartville Block – Volcanic arc accreted onto the North American Plate Sonoma Volcanics – Geologic formation of volcanic origin in California Sonomia...

District Sonoma County is an American Viticultural Area (AVA) within Sonoma Valley and North Coast viticultural areas, just north of the city of Sonoma. This...

rocks of the Pliocene-age Sonoma Volcanics, which are mainly pyroclastic breccias and tuffs, with some interbedded volcanic flows, make up the Howell...

Railroad. He hired them to dig a network of caves through the soft Sonoma Volcanics Formation rock underlying his vineyard. Another Chinese workforce took...

The Sonoma orogeny was a period of mountain building in western North America. The exact age and structure of the Sonoma orogeny is controversial. The...

Pepperwood's geology is complex with exposures of Glen Ellen sediments, Sonoma volcanics and Franciscan metamorphics. There are several areas with serpentine...

Sonoma Mountain is a prominent landform within the Sonoma Mountains of southern Sonoma County, California. At an elevation of 2,463 ft (751 m), Sonoma...

Sonoma County wine is wine made in Sonoma County, California, in the United States. County names in the United States automatically qualify as legal appellations...

with flanks in Napa, Sonoma, and Lake counties of California. Composed of uplifted volcanic rocks from the Clear Lake Volcanic Field, it is one of the...

clays; for example, andesitic and basaltic soils derived from the Sonoma Volcanic soil layers are suitable substrate for this species. The range of this...

Tertiary volcanic flow rocks (rhyolite, basalt and dacite) of the Sonoma Volcanics. The Preserve lies at the extreme upper end of the Sonoma Creek watershed...

by other missions along the coast—eventually extending as far north as Sonoma County. Northern California is not a formal geographic designation. Historically...

a 6.9-mile-long (11.1 km) tributary stream to Schell Creek in southern Sonoma County, California, United States. In Spanish arroyo seco means "dry stream...

conglomerates) and Sonoma volcanic formations which are predominantly composed of Andesite. This equal mix of sedimentary and volcanic rocky soils distinguishes...

stream that rises on the southeastern flanks of the northern Sonoma Mountains in Sonoma County, California, United States. This creek, which drains the...

The Chalk Hill AVA is an American Viticultural Area (AVA) located in Sonoma County, California. The boundaries of the wine appellation cover the northeast...

Sonoma Coast State Park is a State of California property in Sonoma County consisting of public access use on lands adjoining the Pacific Ocean. This...

unincorporated community Bennett County, South Dakota Bennett Mountain, in the Sonoma Mountains, California Bennett Valley Bennett Township (disambiguation) Bennett...

Sonoma State Historic Park is a California State Park located in the center of Sonoma, California. The park consists of six sites: the Mission San Francisco...

California in the United States. It is situated at the northern edge of Sonoma Valley and is adjacent to Spring Lake Regional Park in Santa Rosa. It offers...

ignimbrite in the Basin and Range Province in Nevada. In Napa Valley and Sonoma Valley, California, areas made of tuff are routinely excavated for storage...

geothermal field spanning an area of around 30 square miles (78 km2) in Sonoma, Lake and Mendocino counties in California, centered in the area of Geyser...

the southeastern edge of Santa Rosa, California, at the northeast of the Sonoma Valley and attains a height of 2,733 feet (833 m). The original name was...

Lassen Volcanic National Park is a national park of the United States in northeastern California. The dominant feature of the park is Lassen Peak, the...

a 450-acre nature reserve situated on the northwest flank of Sonoma Mountain in Sonoma County, California. There are eight plant communities within the...

The Russian River Valley AVA is an American Viticultural Area (AVA) in Sonoma County, California. Centered on the Russian River, the Russian River Valley...