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Herald Island (Arctic)
Herald Island ((ロシア語:Остров Геральд), ''Ostrov Gerald'') is a small, isolated Russian island in the Chukchi Sea, to the east of Wrangel Island. It rises in sheer cliffs, making it quite inaccessible, either by ship or by plane. The only sliver of accessible shoreline is at its northwestern point, where the cliffs have crumbled into piles of loose rocks and gravel. Its area is and the maximum height above sea level is . The island is unglaciated and uninhabited.
The island is named for the survey vessel HMS ''Herald'', from which the island was discovered in 1849.
Herald Island belongs administratively to the Chukotka Autonomous Okrug of the Russian Federation. Along with Wrangel Island, Herald Island is part of the Wrangel Island Wildlife Preserve, a Russian National Park, since 1976. Cape Dmitrieva in Herald Island, marks the easternmost limits of the nature reserve.
==Geology==
Herald Island is composed of sedimentary, metamorphic, and igneous rocks. The northeastern tip of this island consists of a -thick sequence of sandstone, phyllite, quartzose sandstone, quartz-chlorite-sericite schist mylonite, and cataclastic quartz syenite. These rocks are of either Proterozoic or Late Paleozoic age. The bulk of this island consists of a Jurassic granite pluton.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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