GEOLOGY OF THE PENGKALAN HULU-BETONG TRANSECT ...

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LIST OF FIGURES
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Figure 1: Location map of the Transect area. ............................................................................. 2
Figure 2: Photographs showing topography of the Transect area............................................... 3
Figure 3: Schematic stratigraphic column of the Betong-Pengkalan Hulu Transect area,
Malaysia (not to scale). ............................................................................................... 1
Figure 4: Simplified geological correlation of the Transect area on the Malaysian side............ v
Figure 5: General succession of the Betong-Pengkalan Hulu Transect area on the Thai side.. 13
Figure 6: Simplified geological correlation of the Transect area on the Thai side. .................. 14
Figure 7: Simplified geological correlation of the rock units in the Pengkalan Hulu-Betong
Transect area.............................................................................................................. 15
Figure 8: Argillaceous facies of the Kroh formation/Betong Formation (SDkr/bt). ................... 19
Figure 9: Fossils in the argillaceous facies of the Kroh formation/Betong Formation (SDkr/bt) on
the Malaysian side of the Transect area. ................................................................... 19
Figure 10: Fossils in the argillaceous facies of the Kroh formation/Betong Formation (SDkr/bt) at
Km 4, Malaysia-Thailand border road, Thailand. ..................................................... 20
Figure 11: Arenaceous facies of the Kroh formation/Betong Formation (SDkr/bt)...................... 20
Figure 12: Outcrops of the Kubang Pasu/Yaha Formation (Ckp/yh) on the Malaysian side......... 24
Figure 13: Photographs showing the successions of the Kubang Pasu/Yaha Formation (Ckp/yh) in
the southern part of the area (Thai side).................................................................... 26
Figure 14: Stratigraphic sequence of the Yaha Formation (Cyh) in the Transect area (Thailand).
................................................................................................................................... 27
Figure 15: Photographs showing the arenaceous facies of the Kubang Pasu Formation/Yaha
Formation (Ckp/yh) in Malaysia. ................................................................................. 28
Figure 16: Photographs showing the arenaceous facies of the Kubang Pasu Formation/Yaha
Formation (Ckp/yh) in Thailand................................................................................... 29
Figure 17: Photographs showing argillaceous facies with thin- to medium-banded phyllite,
phyllitic schist, mica schist and quartz schist of the Yaha Formation (Cyh2), Thailand.
................................................................................................................................... 30
Figure 18: Stratigraphic sequence of the Sri Paen formation (Psp) in the Transect area............. 33
Figure 19: Photographs of the siliceous chert at the lower part of the Sri Paen formation (Psp) at
Amphoe Than To, Map Sheet (5221 III), grid reference 4677847, Thailand. .......... 34
Figure 20: Photographs of the upper portion of the lower part of the Sri Paen formation (Psp) at
Amphoe Than To, Map Sheet (5221 III), Thailand................................................... 35
Figure 21: Well preserved brachiopods and bivalves in the rocks of the Sri Paen formation (Psp)
at Ban Na Kaset, Thailand......................................................................................... 35
Figure 22: Middle portion of the upper part of the Sri Paen formation (Psp) at Ban Na Kaset,
Thailand..................................................................................................................... 36
Figure 23: The slightly developed S1 cleavages in the N-S direction, and generally dipping
eastwards at Ban Than To, Map Sheet (5221 III), Thailand. .................................... 36
Figure 24: Photographs of limestone at Ku Nung Chanong village, in the western part of the
Betong town, Thailand. ............................................................................................. 37
Figure 25: Limestone of the Tham Krachaeng formation (Pkc) at Tham Krachaeng, Ban Than
To, Map Sheet (5221 III), Thailand........................................................................... 38
Figure 26: Fusulinid-bearing limestone of the Tham Krachaeng formation (Pkc) at the Ku Nung
Chanong, Amphoe Betong Map Sheet (5220 IV). .................................................... 38
Figure 27: Stratigraphic sequence of the Gerik Formation (Pgk) exposed at Kampung Batu 2,
Gerik.......................................................................................................................... 40
Figure 28: Photographs of fossils found in the Gerik formation (Pgk), Malaysia. ...................... 41
Figure 29: Photograph outcrops of the Gerik formation (Pgk). ................................................... 42
Figure 30: Photographs of tuffs of the Gerik formation (Pgk), Malaysia. ................................... 42
Figure 31: Photographs of exposures of the Berapit formation (Kbr) at Km 2.2 along the
Malaysia-Thailand border security road (Malaysia). ................................................ 44