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| Aspen grove in autumn color and boulders of Baldhills Tuff of the Isom Formation (deposited as part of the Markagunt Megabreccia of Miocene age) near the Alpine Pond parking area in Cedar Breaks National Monument. The Markagunt Megabreccia includes both sedimentary and volcanic deposits, such as these sheeted lava rocks that locally forms a caprock along the top of the Cedar Breaks. Younger basaltic volcanic rocks crop out in the region that are younger than the Markagunt Megabreccia, including Quaternary age volcanic flows and cinder cones several miles east of the park (Hatfield and others, 2000). |
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