Deposits of Possible Nuee Ardent Origin in the Crater Lake Region, Oregon
Moore BN. 1934. Deposits of Possible Nuee Ardent Origin in the Crater Lake Region, Oregon. Geology. 42(4):358-375
Recent pumice deposits which had their origin in a crater of old Mount Mazama are described and their origin discussed. The chemical and mineralogical composition show no specially interesting features, but field relations and mechanical analyses suggest different modes of origin for the two types recognized. The younger deposit belongs to a normally projected type, though mechanical analyses suggest that sorting by air currents has played a less important role here than is usually considered the case in such deposits. The older pumice, judged from the sorting and other features, has apparently had an entirely different origin, and is regarded as the product of nuées ardentes, or "burning clouds," which distinguish the Peléean type of eruption. Information about Peleean eruptions is briefly summarized, and the characteristics of deposits of nuées ardentes are compared with those of the Crater Lake material.
- Type
- Journal Article
- Authors
- Moore, B
- Units
- CRLA
- Keywords
- nuee ardente, Physical Sciences, Pumice