Geology topics
Research about Hawai'i
Source-linked reports with geographic coverage including Hawai'i.
Reconnaissance map showing thickness of volcanic ash deposits in the greater Hilo area, Hawaii
This study was undertaken to determine the thickness and distribution of volcanic ash deposits in the greater Hilo area, Hawaii, as a step toward evaluating their susceptibility to failure during earthquake shaking. On several occasions their instability has resulted in serious damage. For example, the 1868 earthquake (m=7+), following a prolonged rainy period, caused a debris flow of hillside ash deposits that killed 31 people in Wood Valley (Bringham, 1869). The 1973 Honomu earthquake (m=6.2) resulted in more damage from shaking to areas underlain by ash deposits in the older part of Hilo than in other areas, and soil slips in ash, as well as rockfalls, were common along the roads north of town (Nielsen and others, 1977). Three geologic units are represented on the accompanying map: the ash deposits, a clay bed that locally underlies the ash, and the bedrock material.
Records of small white egrets in Hawaii and Samoa with notes on identification
No abstract available.
Distribution and status of Vicia menziesii Spreng. (Leguminosae): Hawai'i's first officially listed endangered plant species
Vicia menziesii Spreng., Hawai'i's first officially listed endangered plant species, formerly occurred across a large area in the upper montane-mesic forest habitat on the windward side of the island of Hawai'i. Until this species was ‘rediscovered’ in 1974, it had last been seen in 1915, and it was presumed to be extinct. The population is presently thought to number 150–300 plants, most of which are seedlings. These are located within a 200 ha area on the eastern flank of Mauna Loa volcano. The primary factors responsible for the decline of V. menziesii are habitat loss and excessive predation on the plants by introduced ungulates. Continued logging and cattle grazing within its remnant range are major threats to its existence. Enhancing the survival of V. menziesii may best be accomplished by stabilizing its remaining habitat and allowing the population to reestablish itself naturally.
APSRS state-base graphics
The National Cartographic Information Center (NCIC) is the information branch of the U.S. Geological Survey's National Mapping Division. In order to organize and distribute information about U.S. aerial photography coverage and to help eliminate aerial mapping duplication by tracking individual aerial projects, NCIC developed the Aerial Photography Summary Record System (APSRS). APSRS's principal products are State-Base Graphics (SBG), graphic indexes that show the coverage of conventional aerial photography projects over each State.
Records of nests, eggs, nestlings, and cavity nesting of endemic passerine birds in Hawaii
No abstract available.
Letter to the editor: Correction to Hawaii creeper article by Sakai and Ralph
No abstract available.
Additional records of black-legged kittiwakes from the northwestern Hawaiian Islands
No abstract available.