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Kilbourne Hole is an example of an uncommon volcanic feature known as a maar. A maar is a depression caused by a volcanic explosion that emits little volcanic material except gas. Additionally, the olivine and enstatite inclusions have been used in studies of the upper mantle.
Location: Dona Ana County, NM
Year designated: 1975
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Please remember, National Natural Landmarks (NNLs) are not national parks. NNL status does not indicate public ownership, and many sites are not open for visitation.
Last Updated: June 28, 2012