| Abstract: | About This Map
The State‘s geology is presented on eight full-color map sheets, one for each of the major islands. These map sheets, the illustrative meat of the publication, can be downloaded in pdf format, ready to print. Map scale is 1:100,000 for most of the islands, so that each map is about 27 inches by 36 inches. The Island of Hawai`i, largest of the islands, is depicted at a smaller scale, 1:250,000, so that it, too, can be shown on 36-inch-wide paper.
The new publication isn‘t limited strictly to its map depictions. Twenty years have passed since David Clague and Brent Dalrymple published a comprehensive report that summarized the geology of all the islands, and it has been even longer since the last edition of Gordon Macdonald‘s book, Islands in the Sea, was revised. Therefore the new statewide geologic map includes an 83-page explanatory pamphlet that revisits many of the concepts that have evolved in our geologic understanding of the eight main islands.
The pamphlet includes simplified page-size geologic maps for each island, summaries of all the radiometric ages that have been gathered since about 1960, generalized depictions of geochemical analyses for each volcano‘s eruptive stages, and discussion of some outstanding topics that remain controversial or deserving of additional research. The pamphlet also contains a complete description of map units, which enumerates the characteristics for each of the state‘s many stratigraphic formations shown on the map sheets.
Since the late 1980s, the audience for geologic maps has grown as desktop computers and map-based software have become increasingly powerful. Those who prefer the convenience and access offered by Geographic Information Systems (GIS) can also feast on this publication. An electronic database, suitable for most GIS software applications, is available for downloading. The GIS database is in an Earth projection widely employed throughout the State of Hawai`i, using the North American datum of 1983 and the Universal Transverse Mercator system projection to zone 4.
‘This digital statewide map allows engineers, consultants, and scientists from many different fields to take advantage of the geologic database,‘ said John Sinton, a geology professor at the University of Hawai`i, whose new mapping of the Wai`anae Range (West O`ahu) appears on the map. Indeed, when a testing version was first made available, most requests came from biologists, archaeologists, and soil scientists interested in applying the map‘s GIS database to their ongoing investigations.
Another area newly depicted on the map, in addition to the Wai`anae Range, is Haleakala volcano, East Maui. So too for the active lava flows of Kilauea volcano, Island of Hawai`i, where the landscape has continued to evolve in the ten years since publication of the Big Island‘s revised geologic map. For the other islands, much of the map is compiled from mapping published in the 1930-1960s. This reliance stems partly from shortage of funding to undertake entirely new mapping but is warranted by the exemplary mapping of those early experts. The boundaries of all map units are digitized to show correctly on modern topographic maps. |
| Genre: | USGS Numbered Series |
| ProdID: | 79972 |
| Citation Author: | Sherrod, David R.; Sinton, John M.; Watkins, Sarah E.; Brunt, Kelly M. |
| Citation Contributing Office: | USGS Hawaiian Volcano Observatory |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | Version 1.0 |
| Citation Editor: | |
| Citation End Page: | |
| Citation Issue: | |
| Citation Keywords: | |
| Citation Language: | ENGLISH |
| Citation Larger Work Title: | |
| Citation LatN: | 0221500 |
| Citation LatS: | 0185248 |
| Citation LonE: | -1544648 |
| Citation LonW: | -1601612 |
| Citation Month: | |
| Citation No Pagination: | N |
| Citation Number Of Pages: | |
| Citation Online Only Flag: | Y |
| Citation Phsyical Description: | 8 Plates; Pamphlet; ReadMe; Data Files |
| Citation Projection: | Transverse Mercator |
| Citation Public Comments: | |
| Citation Publisher: | Geological Survey (U.S.) |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 2007-1089 |
| Citation Search Results Text: | Geologic Map of the State of Hawai`i; 2007; OFR; 2007-1089; Sherrod, David R.; Sinton, John M.; Watkins, Sarah E.; Brunt, Kelly M. |
| Citation Start Page: | |
| Citation Volume: | |
| Citation Year: | 2007 |
| Type: | citation/reference |
| Text: | Geologic Map of the State of Hawai`i; 2007; OFR; 2007-1089; Sherrod, David R.; Sinton, John M.; Watkins, Sarah E.; Brunt, Kelly M. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| URL (INDEX PAGE): | http://pubs.usgs.gov/of/2007/1089/ |
| URL (INDEX PAGE): | http://ngmdb.usgs.gov/Prodesc/proddesc_81276.htm |
| URL (INDEX PAGE): | http://ngmdb.usgs.gov/Prodesc/proddesc_81277.htm |
| Date Other: | Thu, 24 May 2007 00:00 -0500 |
| Publisher: | Geological Survey (U.S.) |
