Talk:Haleakalā

Astrophysical research
"and its location above one-third of the atmosphere" Is this vandalism, or am I missing something? 10,000 feet isn't even one third of the troposphere (avg 58,000 feet). o0drogue0o 07:54, 12 June 2011 (UTC)
 * This statement refers to the mass of the atmosphere. Approximately one third of the mass of the atmosphere (not quite) lies below 10,000 feet. &mdash; Myasuda (talk) 14:36, 12 June 2011 (UTC)

This seems seriously flawed: "Kahalawai is the older of the two volcanoes at 1,300 years old and Haleakala is 1,200 years old." — Preceding unsigned comment added by 72.130.96.173 (talk) 09:20, 27 October 2014 (UTC)

I agree it is flawed. According to the USGS, "The oldest lava flow exposed on East Maui is about 1.1 million years in age." The ages of all the main island Hawaiian volcanoes can be found in "the book 'Volcanoes in the Sea,' 2nd Ed. by Macdonald, Abbott and Peterson (1983)." Haleakala is listed at 0.41-0.86 million years and West Maui at 1.2-1.6 million years. I do not have a copy of the book source which should have more details. Given all this, I suggest changing the sentence to read "Kahalawai is the older of the two volcanoes at about 1.3 million years old and Haleakala is 1.1 million years old." SEKluth (talk) 17:56, 7 November 2014 (UTC)