...Kim M. Bishop Abstract The Hawaiian Island volcanic edifices have shed at least 15 giant submarine landslides, each classified as either a slump or debris avalanche. Controversy exists regarding the number, size, and type of landslides on the northeast flank of Kohala Volcano. This study provides...

... rift zone of Mauna Kea, but the new ages validate proposals that it is the distal east rift zone of Kohala, the oldest subaerial volcano on the island. These ages constrain the inception of tholeiitic volcanism at Kohala, provide the first measured duration of tholeiitic shield building (≥870 k.y...

... Lanai: Kohala has been subsiding for at least 470 k.y. ( Ludwig et al., 1991 ). On the northwest flank of Kohala, Stearns and Macdonald (1946) found marine fossiliferous conglomerates that they attributed to an ancient highstand. Highstand deposits are incompatible with a sinking volcano, so in May...

...Mark D. Feigenson; Frank J. Spera Abstract At Kohala volcano, Hawaii, the amount of source partial melting decreases rapidly toward the end of magmatic activity. The decreasing amounts of partial fusion lead to progressively higher concentrations of incompatible trace elements in lavas erupted...

...IAN McDOUGALL; D. A SWANSON Abstract Kohala is regarded as the oldest major shield volcano on the island of Hawaii. Potassium-argon ages of nine lava flows from the predominantly tholeiitic Pololu Volcanic Series of Kohala Volcano range from about 0.33 m.y. o t about 0.45 m.y. These results suggest...

...G. BRENT DALRYMPLE Abstract Potassium-argon ages on five lava flows from the Pololu Volcanic Series, thought to be among the oldest rocks exposed on the island of Hawaii, indicate that the main subaerial shield-building phase of Kohala Volcano occurred about 0.7 ± 0.15 m.y. ago and that most...

...IAN McDOUGALL Abstract Kohala Mountain is regarded as the oldest volcano on the island of Hawaii. Potassium-argon ages on three lavas of the Hawi Volcanic Series, the youngest sequence of lavas on Kohala, range from 0.14 to 0.20m.y. and indicate that volcanism ceased in the very late Pleistocene...

... and similar to those of Kohala volcano. This terrace evidently is a product of Kohala instead of Mauna Kea. Almost all of Hilo Ridge below the terrace therefore must predate the principal growth of Mauna Kea, which has superficially isolated the ridge from its Kohala source by overlapping its proximal segment...

..., on the flanks of the extinct Kohala volcano ( Fig. 1 ). This unit is found between modern altitudes of c . 1.5–61 m above sea-level. The deposit is sandwiched between a fossil soil below and a modern soil above in Keawe'ula Bay ( Fig. 2 ). Dating of coral fragments from within the deposit indicate an age...