Notes on Hawaiian petrology

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ID: 296440
1920
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Abstract
Powers outlines the general features of the geology of Hawaii and the life history of Hawaiian volcanoes. The lava flow forming Laupahoehoe peninsula issued from fissures near the mouth of Laupahoehoe Valley. Two major and three minor flows comprise lava from the 1801 eruption of Hualalai. Puu o Keokeo on Mauna Loa is not an independent volcanic center. Pillow lavas are absent on the island of Hawaii, unless in a flow between Waipio and Waimanu valleys. Cinder cones along the southwest coast were formed by lava entering the sea. No trachyte was found in the Kohala Mountains. The trachyte of Puu Anahulu is a flow more than 100 ft thick, and origin of the trachyte by assimilation of limestone in basalt is improbable, owing to the lack of available limestone. The Uwekahuna laccolith at Kilauea is a filled lava tube. Powers quotes unpublished information from L.A. Thurston regarding eruption around 1750 on the southwest side of Haleakala and describes the 1750 flow as olivine-rich aa. He lists localities of nepheline basalt and briefly describes xenoliths as cognate inclusions produced at depth. He repeats stories of earthquake and submarine volcanic activity elsewhere in the island chain, associated in time with events at Kilauea or Mauna Loa.
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Authors Sanger B. Powers
Journal american journal of science
Year 1920
DOI
10.2475/ajs.s4-50.298.256
URL
https://doi.org/10.2475/ajs.s4-50.298.256
Keywords Keywords not found

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