Soil profiles–-Hawaii

Profile of a basalt boulder along Waimea Canyon road, Kauai. Description provided by photographer Roy Simonson reads: "Weathering boulder of melitite basalt in substratum of Halii soil (a profile is shown in I100) with top of ruler 18 inches below surface. Hard, bluish, and unweathered basalt remaining is roughly 13x18 inches and next to it is soft clayey plinthite layer 4 1/4 thick, around which are concentric shells of hardened plinthite totalling 3 1/2 inch thick."

Description provided by photographer Roy Simonson reads: "Purplish dehydrated surface crusts on eroded Naiwa soil along Waimea Canyon road, Kauai."

Description provided by photographer Roy Simonson reads: "Eroded patch of Naiwa soils, Humic Ferruginous Latosols with unusually high content of titanium, along the edge of Waimea Canyon, Kauai. Formed with lava flows, the soil is thought by Don Sherman to represent the final stage of weathering for the region. Layer of maximum concentration of oxides, largely iron and titanium, is friable but not penetrable by plant roots. Spade is 2 feet long."

Description provided by photographer Roy Simonson reads: "Profile of Haiku clay, Humic Ferruginous Latosol, from which samples of laterite were obtained; west of Lihue, Kauai; Kandiudult."

Description provided by photographer Roy Simonson reads: "Profile of Hilo clay, Hydrol Humic Latosol formed from volcanic ash, about 3 miles northwest of Hilo, Hawaii; Haplaquand."

Description provided by photographer Roy Simonson reads: "Profile of Honokaa clay, Hydrol Humic Latosol, probably from volcanic ash, about 7 miles west of Honokaa, Hawaii."

Description provided by photographer Roy Simonson reads: "Profile of Kahana clay, Low Humic Latosol formed from weathered basalt in old lava flow north of Lihue airport, Kauai. Tropeptic Haplustox."

Description provided by photographer Roy Simonson reads: "Roadcut through soils of Kahana family, Low Humic Latosols from basic rock, along the Makawao-Kula route on Maui. Grass and cactus growing on soil in cut, with eucalyptus trees in the background. Haplustox."

Description provided by photographer Roy Simonson reads: "Profile of Kohala clay, Low Humic Latosol formed from weathered basalt plus some volcanic ash and slope wash; about 1 mile southeast of Honomakau, Hawaii. Ustic Humitropept."

Description provided by photographer Roy Simonson reads: "Profile of Kolekole clay in roadcut; Ustoxic Humitropept."