green. Conglomerate cliffs are found on the east coast of Scotland from Arbroath northwards along the coastlines of the former counties of Angus and Kincardineshire. Dunnottar Castle sits on a rugged promontory of conglomerate jutting into the North Sea just south of the town of Stonehaven. Copper Harbor Conglomerate is found both in the Keweenaw Peninsula and Isle Royale National Park in Lake Superior. Conglomerate may also be seen in the domed hills of Kata Tjuta, in Australia's Northern Territory or in the Buda Hills in Hungary. In the nineteenth century a thick layer of Pottsville conglomerate was recognized to underlie anthracite coal measures in Pennsylvania. Examples on Mars On Mars, slabs of conglomerate have been found at an outcrop named "Hottah", and have been interpreted by scientists as having formed in an ancient streambed. The gravels, which were discovered by NASA's Mars rover Curiosity, range from the size of sand particles to the size of golf balls. Analysis has shown that the pebbles were deposited by a stream that flowed at walking pace and was ankle- to hip-deep. Metaconglomerate Metamorphic alteration transforms conglomerate into metaconglomerate. See also Puddingstone Jasper conglomerate References External links Conglomerate at Cushendun, Northern Ireland Sedimentary rocks