Proceedings of the Royal Society of London Volume 30. Royal Society
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Author: Royal Society
Number of Pages: 210 pages
Published Date: 06 Aug 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: Englishhttps://d20eq91zdmkqd.cloudfront.net/assets/images/book/large/9781/1301/9781130126006.jpg
Format: eBook
ISBN: 9781130961010
File size: 21 Mb
File Name: Proceedings.of.the.Royal.Society.of.London.Volume.30.pdf
Download Link: Proceedings of the Royal Society of London Volume 30
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1880 edition. Excerpt: ...formation which constitutes the major part of the highlands of north-west Borneo. The limestone hills nowhere attain to a greater elevation than 1,800 feet above the sea-level, at any rate in Sarawak, and they more commonly vary from 300 feet to 800 feet in height. In the Baram district the Mulu Mountain is said to be limestone and to rise to a height of 9,000 feet, but I am not aware that it has ever been visited by a European observer. The hills invariably spring up steeply from the low country, and the majority of them present lines of old seacliffs which generally face to N. and N.W., i.e., towards the quarter still occupied by the waters of the sea. The rock itself is much fissured and jointed, and the hills in many instances are absolutely honeycombed with caverns. As is usual in limestone districts the drainage of the country is largely subterranean. Owing to this fact, coupled with the heavy rainfall (the mean for the last three years was 165 inches at Kuching), the land at the base of the hills is subject to frequent flooding during the prevalence of the north-east monsoon, when the underground watercourses are of insufficient capacity to carry off the water as fast as it reaches them. As an instance of the extent to which subterraneous drainage with its consequent subterranean denudation has gone on in Sarawak, I may cite the Siniawan river, which passes beneath four distinct hills in its short course, and one of these hills--the Jambusan Hill--is pierced besides by at least three ancient rivertunnels of large size at varying levels. 2. The Caves and their Deposits. The total number of the caves examined by me has been thirty-two, of which two were situated in Mount Sobis, up the Niah river, and the remainder in Upper Sarawak Proper....
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