Sequence of two gray pyroclastic-flow deposits and a yellowish laha...
Detailed Description
This exposure is in the Little Zigzag Canyon on the southwest flank of Mount Hood. A prismatically jointed boulder can be seen in the center, yellowish, lahar deposit. The deposits were emplaced during the Timberline eruptive period about 1,500 years ago. Shovel is about two feet (55 centimeters) long.
Related
Eruption History of Mount Hood, Oregon
Mount Hood, which has been active for at least 500,000 years, occupies a long-lived focus of volcanic activity that has produced ancestral Hood-like volcanoes for the past 1.5 million years.
Related
Eruption History of Mount Hood, Oregon
Mount Hood, which has been active for at least 500,000 years, occupies a long-lived focus of volcanic activity that has produced ancestral Hood-like volcanoes for the past 1.5 million years.