Monterey Bay Aquarium Research Institute

Mapping Program

Haleakala Survey

The Haleakala survey shows a 55-by-20-kilometer smooth section of the rift zone east of Maui that was once above sea-level. The region is marked by a series of shoreline features, including several prominent coral reefs (best seen in the third oblique view below) and as previously described by Moore et al. (1990) and Clague et al. (1998). These reefs and shorelines are tilted down to the south because of flexure related to the growth of Hawaii. 

This gently-sloping platform is dotted with numerous pointed volcanic cones at the western end nearest the island (Clague et al., 1999, 2000). These cones do not have summit craters like their subaerial counterparts and are inferred to have erupted below sea level. They are probably composed of alkalic basalt or hawaiite erupted at the same time as the post-shield Kula Volcanics on East Maui Volcano. One cone is surrounded by an area of high backscatter, as seen in the second oblique view, and may be younger, and have thinner sediment cover, than the other pointed cones. Previous sampling of this cone shows that it consists of fragmental hawaiite coated with thick hydrothermal manganese-oxides (Hein et al., 1996)

The rift zone below the break-in-slope, as seen in the first oblique view, is characterized by flat-topped volcanic cones (Clague et al., 1999, 2000), most of which are very similar in form to those on the slopes of Ni`ihau, although a few have central summit craters. Two irregularly-shaped perched lava ponds with levees (Clague et al., 1999, 2000) occur among the cones.

Survey Detail

haleakalamap.jpg (257506 bytes)

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MBARI provides these data "as is", with no warranty, express or implied, of the data quality or consistency. Data are provided without support and without obligation on the part of the Monterey Bay Aquarium Research Institute to assist in its use, correction, modification, or enhancement.

Name
(Grid Cell Size)
Grid Sun Illuminated Image Acoustic Reflectivity Image
(at 1/2 grid cell size)
hlekla 30meters grids\hlekla.asc.gz geoTIFFS\sunshade\hlekla.tif geoTIFFS\backscatter\hlekla.tif
hleklb 30meters grids\hleklb.asc.gz geoTIFFS\sunshade\hleklb.tif geoTIFFS\backscatter\hleklb.tif
hleklc 20meters grids\hleklc.asc.gz geoTIFFS\sunshade\hleklc.tif geoTIFFS\backscatter\hleklc.tif
hlkl2khla 30meters grids\hlkl2khla.asc.gz geoTIFFS\sunshade\hlkl2khla.tif geoTIFFS\backscatter\hlkl2khla.tif
mlk2hlklc 20meters grids\mlk2hlklc.asc.gz geoTIFFS\sunshade\mlk2hlklc.tif geoTIFFS\backscatter\mlk2hlklc.tif
mlk2hlkld 20meters grids\mlk2hlkld.asc.gz geoTIFFS\sunshade\mlk2hlkld.tif geoTIFFS\backscatter\mlk2hlkld.tif
mlk2hlkle 20meters grids\mlk2hlkle.asc.gz geoTIFFS\sunshade\mlk2hlkle.tif geoTIFFS\backscatter\mlk2hlkle.tif

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Map view 1

Map view 2

Oblique view 1

Oblique view 2

Oblique view 3

Oblique view 4

Index Map Haleakala Hilo Kohala Loihi  Mahukona  Moloka`i  Ni`ihau  Papa`u Puna Ridge

Last updated: Oct. 02, 2013