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Diagram showing the origin of fissure volcanoes from dikes intersecting the surface and feeding lava flows (NPS graphic)

By California Volcano Observatory 2022 (approx.)
Diagram showing the origin of fissure volcanoes from dikes intersecting the surface and feeding lava flows. In a cutaway block of the earth's crust, a thin red vertical slab of magma is labeled to indicate upward movement. Its intersection with the surface is marked with fissures in bright orange, accompanied by a drawing of an erupting spatter cone and lava flows, all within a shallow faulted basin.
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Detailed Description

Graphic by Trista Thornberry-Ehrlich (Colorado State University) after Hughes and others (1999) -- Mafic Volcanism and Environmental Geology of the Eastern Snake River Plain.

Sources/Usage

Public Domain.

Original graphic from https://www.nps.gov/articles/000/fissure-volcanoes.htm