USGS HOME
Contact USGS

  • About
  • Observatories
  • Activity
  • Education
  • Publications

Glossary - Coulee

Coulee

An elongate lava dome that typically forms as a high-silica lava erupts on the steep flank of a volcano. The dome axis perpendicular to the volcano's slope is shorter than the axis parallel to the slope, creating an elliptical shape. The leading edge of the coulee is often blocky and steep.

Glossary Terms


A
B
C
D
E

F
G
H
I
K
L
M
O
P

Q
R
S
T
U
V