Sunday, October 03, 2010


Pematang Formation (Oligocene to early Miocene ) 
Description: Carboneceous and red shale, Coal, siltstone, sandstone and breccio conglomerate
Lakat Formation (Oligocene to early Miocene ) 
Description: Lower part: polymict conglomerate, quartz sandstone and intercalated claystone, siltstone and tuff, with coal lenses. Upper part: alternating bands of quartz sandstone and silty carboneceous claystone with siderite nodules
Kelese Formation (Eocene)
Description: Light grey, brown and greenish, strongly lithified polymict conglomerate and conglomeratic sandstone with intercalation of siltstone ,claystone and coal
Lower member of Ombilin Formation (Mio-Pliocene ) 
Description: Micaceous quartz sandstone,arkose,clayey shale Quartz conglomerate and coal
Upper member of Ombilin Formation (Miocene)
Description: Sandy claystone ,Tuffaceous sandstone, quartz sandstone, glauconite sandstone, marly sandstone, coal seams and conglomerate with andesitic components
Muaraenim Formation (Mio-Pliocene )
Description: Sandstone,sandy claystone,and Lignite which reaches upto 10% of the formation thickness
Sinamar Formation (Oligocene) 
Description: Conglomerate coarse grained quartz sandstone, Miceceous quartz sandstone, Arkosic sandstone. claystone, marl, sandy claystone, coal seams and coral limestone
Talangakar Formation (Oligocene)
Description: Brownish dark grey sandstone, Sandy tuff and tuffecious sandstone with uniformly distributed, lignite locally and intercalated clay stone. Yellowish white limestone lenses in the lower part of the formation.
Papanbeteopang Formation (Oligocene)
Description: Polymict conglomarate, sandstone, claystone, siltstone and breccia with intercalation of tuffaceous sandstone and claystone, coal
Airbenakat Formation (Miocene)
Description: Clay stone alternating with sandstone incalation of calcareous conglomarate, siltstone, marl and coal. In the upper part dominantly sandstone
Simpangaur Formation (Pliocene)
Description: Claystone, breccia, tuffaceous sandstone, sandstone contains mollusas with coal intercalations
Kasai Formation (Late Pliocene)
Description: Conglomarate and Quartz sandstone, tuffaceous claystone containing silicified wood with pumice tuff and lignite intercalations
Bintunan Formation (Late Pliocene)
Description: Polymict conglomarate sandstone, claystone, pumice tuff with lignite intercalations, claystone contains mollusus
Sihapas Formation (Miocene) 
Description: Clean quartz sandstones, carbanaceous shales, siltstones, conlomarates 
Telukkido Formation (Jurassic to Cretaceous)
Description: Pyritic feldspathic meta quartzos Arenites and Argillites, thin coal and plant remains
Kumun Formation (Mio-Pliocene)
Description: Sandstone, Conglomarate, breccia, Lignite and tuff intercalation
Lemau Formation (Miocene)
Description: Breccia, dacaoitic tuff, sandstone with lignite intercalation, claystone containing mollusus and calcareous sandstone
Ranggam Formation (Mio-Pliocene)
Description: Alternate sandstone, claystone and conglomarate with lenses of coal


Kaiwan Elavia said...

Mr. Sundar I am also a geologist and have read all your information that you have put on your blog site. Its very Informative, wht I wana ask is is all this information from a specific location or is it generalized info?

Also if it is from a specific field study please mention the location as it will add to the information and become a little specific.


Sundar Raj said...

These are very generalized information which are collected from the geological map published by Indonesian government.

We Like Stone said...

I generally want quality content and this thing I found in your blog about We Like Stone. It is beneficial and significant for us. Keep sharing these kinds of blog.