The lava that forms them tends to form rocks without gas bubbles, and when they erupt, frequently a fissure along their sides will form, creating spatter ramparts in a phenomenon called a curtain of fire, though on the whole their eruptions are characterized as relatively calm.
The Sif-Gula region of Venus forms complexes of these structures, where these objects do not observe the linear patterning they do on Earth. The lava that forms them tends to form rocks without gas bubbles, and when they erupt, frequently a fissure along their sides will form, creating spatter ramparts in a phenomenon called a curtain of fire, though on the whole their eruptions are characterized as relatively calm. For 10 points, identify these volcanoes formed by low-viscosity basaltic lava, exemplified by Mauna Loa and Mauna Kea, best known for their broad, shallow sides.
The Sif-Gula region of Venus forms complexes of these structures, where these objects do not observe the linear patterning they do on Earth.
{shield} volcano [prompt on volcano]