Holocene seas at Pulau Pinang and Pulau Langkawi: new dates Tosido Nakamura, Hong Djin Tjia

Holocene seas at Pulau Pinang and Pulau Langkawi: new dates Tosido Nakamura, Hong Djin Tjia

The radiocarbon ages of four groups of fossil subsea bivalve accumulations and four elevated fossil oyster clusters from the vicinity of Pulau Pinang and from Pulau Langkawi were determined at the Dating and Materials Center of Nagoya University, Japan. The subsea samples indicated that the Pinang C...

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Main Authors: Tosido Nakamura, Hong Djin Tjia
Format: Article
Published: Universiti Kebangsaan Malaysia 2002
Online Access:http://journalarticle.ukm.my/3819/
http://journalarticle.ukm.my/3819/
id ukm-3819
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spelling ukm-38192012-03-21T01:23:34Z http://journalarticle.ukm.my/3819/ Holocene seas at Pulau Pinang and Pulau Langkawi: new dates Tosido Nakamura, Hong Djin Tjia Tosido Nakamura, Hong Djin Tjia, The radiocarbon ages of four groups of fossil subsea bivalve accumulations and four elevated fossil oyster clusters from the vicinity of Pulau Pinang and from Pulau Langkawi were determined at the Dating and Materials Center of Nagoya University, Japan. The subsea samples indicated that the Pinang Channel remained under water during 1500-1900y B.P. [0 B(efore) P(resent) refers to year 1950] and around 450y B.P. In the northern Strait of Melaka, sea level declined regional from + 2.5 m aMSL at 4600y B.P. to + 1.25 m aMSL at 1400y B.P. The eight new data is consistent with the established Late Quaternary - Holocene sea level curve of Peninsular Malaysia. In the Langkawi islands several good shoreline indicators (corals and rock-clinging oysters) between 6500 and 9500y B.P. show early Holocene seas that were 20 to 40 metres above the established sea-level curve. The cause of these anomalous positions is still problematic. Drastic geoidal change or rebound of the land surface following impacts by two recent (6500-5000y B.P.) extraterrestrial objects offer the more plausible explanations. Universiti Kebangsaan Malaysia 2002 Article PeerReviewed Tosido Nakamura, and Hong Djin Tjia, (2002) Holocene seas at Pulau Pinang and Pulau Langkawi: new dates Tosido Nakamura, Hong Djin Tjia. Sains Malaysiana, 31 . pp. 23-31. ISSN 0126-6039 http://www.ukm.my/jsm/english_journals/vol31_2002/vol31_02page23-31.html
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institution Universiti Kebangasaan Malaysia
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description The radiocarbon ages of four groups of fossil subsea bivalve accumulations and four elevated fossil oyster clusters from the vicinity of Pulau Pinang and from Pulau Langkawi were determined at the Dating and Materials Center of Nagoya University, Japan. The subsea samples indicated that the Pinang Channel remained under water during 1500-1900y B.P. [0 B(efore) P(resent) refers to year 1950] and around 450y B.P. In the northern Strait of Melaka, sea level declined regional from + 2.5 m aMSL at 4600y B.P. to + 1.25 m aMSL at 1400y B.P. The eight new data is consistent with the established Late Quaternary - Holocene sea level curve of Peninsular Malaysia. In the Langkawi islands several good shoreline indicators (corals and rock-clinging oysters) between 6500 and 9500y B.P. show early Holocene seas that were 20 to 40 metres above the established sea-level curve. The cause of these anomalous positions is still problematic. Drastic geoidal change or rebound of the land surface following impacts by two recent (6500-5000y B.P.) extraterrestrial objects offer the more plausible explanations.
format Article
author Tosido Nakamura,
Hong Djin Tjia,
spellingShingle Tosido Nakamura,
Hong Djin Tjia,
Holocene seas at Pulau Pinang and Pulau Langkawi: new dates Tosido Nakamura, Hong Djin Tjia
author_facet Tosido Nakamura,
Hong Djin Tjia,
author_sort Tosido Nakamura,
title Holocene seas at Pulau Pinang and Pulau Langkawi: new dates Tosido Nakamura, Hong Djin Tjia
title_short Holocene seas at Pulau Pinang and Pulau Langkawi: new dates Tosido Nakamura, Hong Djin Tjia
title_full Holocene seas at Pulau Pinang and Pulau Langkawi: new dates Tosido Nakamura, Hong Djin Tjia
title_fullStr Holocene seas at Pulau Pinang and Pulau Langkawi: new dates Tosido Nakamura, Hong Djin Tjia
title_full_unstemmed Holocene seas at Pulau Pinang and Pulau Langkawi: new dates Tosido Nakamura, Hong Djin Tjia
title_sort holocene seas at pulau pinang and pulau langkawi: new dates tosido nakamura, hong djin tjia
publisher Universiti Kebangsaan Malaysia
publishDate 2002
url http://journalarticle.ukm.my/3819/
http://journalarticle.ukm.my/3819/
first_indexed 2023-09-18T19:39:51Z
last_indexed 2023-09-18T19:39:51Z
_version_ 1777405517509951488

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