skip all navigation
skip banner links
skip primary navigation

Open-file Report - 541
A geologic study of the Capulin Volcano National Monument and surrounding areas, Union and Colfax Counties, New Mexico

William O. Sayre and Michael H. Ort

2011

Capulin Volcano is a unique cinder cone in the National Park System. Its boca, or mouth, at its western flank, is more complex than most cinder cones. The volcano is very accessible, with a paved road to its rim, and it has become a well-established stop for both tourists and university geology field trips.

The eruption of Capulin volcano took place about 60,000 years ago over a period of a month to a few years. The first lava flows came out of small vents, followed by the eruption of cinder to make the volcanic edifice itself. After the cone grew to its present height, more lava was erupted from the western base of the volcano, forming the boca or mouth, consisting of several vents, lava lakes and lava tubes. These flows soon surrounded the volcano.

Download

Open-file Reports are available as free downloads or on CD/DVD-ROM (see below). Note that these reports are subject to frequent revisions and may be unavailable when being modified. The Last Modified date listed here reflects when a file was last saved and may not be the date this report was last revised.

File Name Size Last Modified
ofr_541.pdf 2.03 MB 08/03/2011 03:11:18 PM

Most open-file reports are PDF files and require the free Adobe Acrobat Reader software to view. These reports may also contain GIS data or other file types, and some are collections of files that are intended to run from a CD-ROM or local hard drive.

$10.00 Buy Now
CD or DVD-ROM format CD or DVD-ROM format

Also available as a free download.