Perth Canyon

Perth Canyon is a submarine canyon located on the edge of the continental shelf off the coast of Perth, Western Australia, approximately 22 kilometres (14 mi) west of Rottnest Island. It was carved by the Swan River, probably before the Tertiary, when this part of the continental shelf was above sea level. It is an average of 1.5 kilometres (5,000 ft) deep and 15 kilometres (9.3 mi) across, making it similar in dimension to the Grand Canyon.

单词	Perth Canyon
释义	Perth Canyon 英语百科 Perth Canyon Perth Canyon is a submarine canyon located on the edge of the continental shelf off the coast of Perth, Western Australia, approximately 22 kilometres (14 mi) west of Rottnest Island. It was carved by the Swan River, probably before the Tertiary, when this part of the continental shelf was above sea level. It is an average of 1.5 kilometres (5,000 ft) deep and 15 kilometres (9.3 mi) across, making it similar in dimension to the Grand Canyon.
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