![]() ![]() ![]() Leaving a notched coastal shape, as shown in the diagram. Windward shores feel the brunt of the ocean'sĪssault and here erosional forces work most quickly to plane away the rock, Hawaii's surrounding ocean hammers relentlessly at the coastline, carving awayĪ bit of the islands with each wave until, ultimately, it completely erases As the islands flatten out, the erosional work of the ocean along the coastlines becomesĪ more dominant shaping force. Relatively flat terrain such as the Lihue area of southeast Only the fluted valley headwalls and retreating ridges presiding over Valleys." The original valley walls eventually disappear leaving Ridges form in the wet interiors separating " vertical Notice how the houses rise up the smooth planeze of Waahila Ridge to a triangularĪpex, after which a narrow ridge divides the upper (and converging) valleysĭ above) the planezes wear completely away, such as seen in the east Oahu image above. They isolate triangular sections near the coast called planezes,Īs illustrated in B above and seen on the house-covered slopes above Honolulu. As the valley heads widen and converge in the mountainous island interiors, In stage B, aging valleys widen into the familiar amphitheater-headed valleys such as Manoa. The area between the valleys will eventually erode into a triangular shape. In the image below, Waipio Valley has captured the headwaters of Waimanu The dominant water conduit in a process called streamĬapture. Reaches of stream-cut valleys may converge, with one valley becoming Volcanic islands, streams radiate outward from mountainous centers in a radial drainage pattern. On their path to the ocean, streams flow over lava rock with differing resistances to erosion, often forming stepped courses with plunge ![]() The narrow stream channels identified by dark green strips of trees. In the initial youthful stages (A and B), streams carve well spaced, steep-sided, V-shaped valleys separated by wideįlat expanses of the original shield volcano surface such as seen along the Hamakua coast of the Big Island above. Geologists have identifiedĪ gradual erosion progression for Hawaiian mountains in youthful stages (A and B) and mature stages (C and D), as illustrated below (from Macdonald et al., Shaping of the surface of Hawaii's shield volcanoes. Be sure to click the sub-menu links under each of these major topics.įluvial refers to the work of water, which is responsible for most of the erosional Click the links at the right for lessons on Large Scale Features, Vents, Lava Flows, and Lava Transport. Review the volcanic landforms lessons provided by Volcano World for Hawaiian Volcanism. Material carefully and can recognize all of the landforms. Before taking the quiz, be sure that you have gone through all of the On the quiz, you willīe shown images of 20 of the following landforms, chosen at random. ![]() Lessons and resources provided by Volcano World, currently maintained at Oregon State University. The Hawaii Landforms Lab includes a combination original fluvial and coastal geomorphology Purpose: This lab introduces some of Hawaii's basic landforms and helps You can repeat the quiz if you wish I will keep the highest grade. All quizzes will be somewhat different because questions are randomly In the Submit Labs area, simply click theĪppropriate lab quiz, follow instructions, and answer the 20 multiple choice Writeup Instructions: For this lab, you will take a MULTIPLE CHOICE QUIZ. Hawaii Landforms Hawaii Landforms Geography 101 Lab ![]()
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