Scenery of Maui's Beaches & Coastlline.
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Winter waves breaking on Keanae Peninsula, east Maui. Looking westward toward Honomanu Bay. The scar of a roadcut for the Hana Road is clearly visible on the cliff in the upper left corner of the image. As recently as 1,200–1,500 years ago, rejuvenated lava of the Häna Volcanic Series flooded the deep erosional Ke‘anae Valley on the northeast side of Haleakalä, creating a wide, shallow, and jagged lava fan that reaches 1.5 km into the ocean. West of Ke‘anae the sea cliff coastline extends, giving way to only a few narrow stretches of boulder beach backed by deep thickly vegetated valleys like those found within the embayments at Honomanü and Makaïwa.
At Nahiku Landing, violent surf generated by strong prevailing winds slams into the exposed rocks of the near-shore reef. These rocks originally formed the leading edge of a volcanic flow that reached the sea. Nahiku, east Maui.
Strong prevailing winds and storm surges generate the pounding waves that continually break on the bare rock of old lava flows that form the shoreline of the Keanae Peninsula, east Maui. The wave action also creates narrow black-sand beaches consisting of sharp, coarse grains of black basalt thoroughly mixed with large coral fragments washed in from the numerous patch reefs offshore.
Intense wave action has steadily eroded this promontory of trachyte ash near Kahakuloa Head, west Maui.
Light-colored trachyte overlies a dark-red laterite paleosol (see outcrop just below eroding gray promontory in center of photograph). The trachyte was erupted as ash and cinders when the trachyte dome at Kahakuloa Head was emplaced in the large active cinder cone. Photograph taken southeast of Kahakuloa village, west Maui.
Eroded headland in Kahakuloa Bay, west Maui.
Collapsed lava tubes and flow basalt outcrops that form shoal water off Pa'uwela Point, Ha'iku, north Maui.
Close-up of a sea stack in Poelua Bay, near the Kahekili Highway, west Maui.
Lithified sand dune deposits crop-out in the parking lot of Haleki'i-Pihana Heiau State Monument, north Maui. The dunes grew and migrated to their present position during the last Ice Age, when the sea level was considerably lower and broad stretches of coral sand were exposed to strong prevailing winds. The rise in sea level at the end of the Ice Age submerged much of the original sand supply. The individual grains of sand are cemented together by calcium carbonate precipitated from carbonate-rich seawater. This area was characterized by extensive low sand dunes during the dynamic changes in relative sea level of the Pleistocene Epoch. Much of the shoreline in this area now contains long beaches of calcareous sand mixed with coral rubble and basalt rock. Broad patches of lithified beachrock lie at the waters edge.
Winter waves breaking on Keanae Peninsula, east Maui. Looking westward toward Honomanu Bay. The scar of a roadcut for the Hana Road is clearly visible on the cliff in the upper left corner of the image.

As recently as 1,200–1,500 years ago, rejuvenated lava of the Häna Volcanic Series flooded the deep erosional Ke‘anae Valley on the northeast side of Haleakalä, creating a wide, shallow, and jagged lava fan that reaches 1.5 km into the ocean. West of Ke‘anae the sea cliff coastline extends, giving way to only a few narrow stretches of boulder beach backed by deep thickly vegetated valleys like those found within the embayments at Honomanü and Makaïwa.
Winter waves breaking on Keanae Peninsula, east Maui. Looking westward toward Honomanu Bay. The scar of a roadcut for the Hana Road is clearly visible on the cliff in the upper left corner of the image. As recently as 1,200–1,500 years ago, rejuvenated lava of the Häna Volcanic Series flooded the deep erosional Ke‘anae Valley on the northeast side of Haleakalä, creating a wide, shallow, and jagged lava fan that reaches 1.5 km into the ocean. West of Ke‘anae the sea cliff coastline extends, giving way to only a few narrow stretches of boulder beach backed by deep thickly vegetated valleys like those found within the embayments at Honomanü and Makaïwa.
Winter waves breaking on Keanae Peninsula, east Maui. Looking westward toward Honomanu Bay. The scar of a roadcut for the Hana Road is clearly visible on the cliff in the upper left corner of the image.

As recently as 1,200–1,500 years ago, rejuvenated lava of the Häna Volcanic Series flooded the deep erosional Ke‘anae Valley on the northeast side of Haleakalä, creating a wide, shallow, and jagged lava fan that reaches 1.5 km into the ocean. West of Ke‘anae the sea cliff coastline extends, giving way to only a few narrow stretches of boulder beach backed by deep thickly vegetated valleys like those found within the embayments at Honomanü and Makaïwa.
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