Gua Tempurong
Gebauer and Price (1995) present a comprehensive speleological and geomorphological study of Gua Tempurung, a 3.4 km tunnel cave in the fengcong-type karst of the Kinta Valley, Perak, based on a February 1993 survey. The article situates the cave within the broader tectonic and climatic history of West Malaysian karst, arguing that its 150-metre vertical column of chemo- and physioclastic deposits constitutes a unique sedimentary archive of eustatic sea-level fluctuations intertwined with orogenetic phases of the peninsula.
Summary
The article opens with a geographic and geological framework for West Malaysian karst, tracing the distribution of limestone outcrops from Perlis in the north to Selangor in the south and explaining how Mesozoic east-west erosion patterns, Tertiary uplift, and metamorphism produced the characteristic fengcong (tropical karst tower clusters) landscape of the Kinta Valley. The Permian Kinta formation limestones, metamorphosed to marble, form the bedrock of the Gunung Gajah-Tempurung massif, the largest and best-studied fengcong in the valley. Gebauer and Price draw on the karstographical terminology of Chinese geographers (gufeng, fengcong, fenglin) to classify the landscape, and they discuss the role of footcaves in both the mechanical development of karst towers (through solutioal undermining) and in cultural history, from prehistoric rock paintings at Tambun to Mahayana Buddhist shrines and more recent Chinese cave temples.
The core of the article is the 1993 survey and description of Gua Tempurung itself. The cave is identified as a tunnel cave whose function derives from the drainage of allogeneic water rising from a non-karstic granite catchment, making its role as a collector of local precipitation negligible. The authors interpret the cave’s development as controlled by two transposed fault systems cut by a major north-south thrust that has horizontally dislocated east-west passages by 70 metres. The initial high-level passages are attributed to mixing corrosion at a palaeo-isohaline, while the lower meandering river passage reflects abrasion by quartzite- and feldspar-sand-laden allogeneic water. The succession of abandoned fossil levels, each marked by alternating chemoclastic (dripstone, flowstone) and physioclastic (gravel, sand, mud) deposits, is read as a record of repeated base-level changes driven by eustatic sea-level oscillations over the Quaternary.
The article closes with a discussion of the cave’s current threats: commercial tourism development proposed by the Perak State Government in 1993 (estimated at RM3.9 million), the opening of the North-South Highway in 1994, and the cumulative damage from tin mining, guano extraction, and unregulated visitor traffic. The authors frame the cave’s “supposedly worthless” sedimentary deposits as a non-renewable palaeoenvironmental record of incommensurable value.
Key Findings
- The 1993 survey (2–5 February) recorded 4,392 m of survey legs, 97% at BCRA 4c precision, yielding an approximate passage length of 3.44 km and a maximum elevation of +150.8 m above the resurgence (p. 42, footnote 8).
- The two principal chambers are Gergasi Cavern (approximately 200 m long, 150 m wide, 75 m high) and Alam Cavern (130 m wide, 200 m long), the latter containing boulders estimated at 3,000 tons (pp. 46–47).
- The active river passage spans 1.6 km between the resurgence at 21 m a.s.l. and the sink at 43 m a.s.l., with a gradient of 0.37%; flow was estimated at 6 ± 2 L/s at the sink and 8 ± 2 L/s at the resurgence in February 1993 (pp. 39, 47, footnote 6).
- Intraspelean traces of tin exploitation reach 50 vertical metres above the present erosional base level (70 m a.s.l.), while the initial cave levels lie at 190 m a.s.l., or 150 m above the resurgence (pp. 41, 43).
- The proposed 1993 tourism development was budgeted at RM3.9 million (£1 million) and included a road to the west entrance, catwalks, and potential drilling to widen narrow passages (p. 48).
- The North-South Highway Gopeng–Tapah stretch, passing the east side of the massif, was opened in February 1994 after authorities were persuaded to divert the route away from cutting through the Tempurung massif (p. 48).
Conclusion
Gebauer and Price’s definitive takeaway is that Gua Tempurung’s 150-metre vertical sedimentary column—preserved in situ and shielded from surface environmental influences—constitutes a unique and non-renewable record of Perak’s Quaternary landscape and climate history. They argue that while the economically valuable ores and guano have been entirely destroyed by extraction, the “supposedly worthless” deposits retain a multitude of decipherable information and demand conservation under all circumstances.
Context
- The primary fieldwork was conducted 2–5 February 1993 by Gebauer, Sylke Buchsot, and Liew Chin Chow, assisted by Lim Swee Yian and Wong Chan Yoon; the survey supersedes the 1975 map produced in Crowther’s hydrochemical Ph.D. thesis (University of Hull, 1980), correcting the relative positions of sink and resurgence and adding the fossil passages “Top of the World” and “End of the World” (p. 42, footnote 8).
- The article contributes to the historiography of West Malaysian karst by integrating Chinese karstographical terminology with Western geomorphological frameworks and by explicitly linking speleological survey data to eustatic sea-level reconctions, a synthesis not previously attempted for a Kinta Valley cave.