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Global Volcanism Program | Image GVP-08280

The Laguna Río Cuarto maar occupies the northern end of a chain of volcanic vents extending to about 18 km north of Poás volcano.  The 600 x 750 m wide maar has a maximum depth of 66 m and is bounded by low walls that rise only 4-20 m above the lake surface.  The maar was erupted through lahar and alluvial deposits on the coastal plain at an elevation of only about 400 m above sea level. Photo by Paul Kimberly, 1998 (Smithsonian Institution).

The Laguna Río Cuarto maar occupies the northern end of a chain of volcanic vents extending to about 18 km north of Poás volcano. The 600 x 750 m wide maar has a maximum depth of 66 m and is bounded by low walls that rise only 4-20 m above the lake surface. The maar was erupted through lahar and alluvial deposits on the coastal plain at an elevation of only about 400 m above sea level.

Photo by Paul Kimberly, 1998 (Smithsonian Institution).


Poás