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 Name of Unit: Kualu Formation

Geology
Description
Thinly bedded sandstone, wacke, siltstone and mudstone, carbonaceous mudstones with numerous plant and wood fragments, passes up into more arenaceous portion, occasionally calcareous beds. Cross bedding, load and flute casts and small slump structures characterized the finer bedding portions.
Stratigraphic Relationship
Underlain by Tapanuli Group Sedimentary Unit s
Formation Name
Kualu Formation / of the Peusangan Group [1982]
Nomenclature
Clarke et al. (1982)
Fossils

Halobia sp.

Unit Code:
Mtk
Age :
No Data
Thickness (m):
1000
Tectonic Settings:
Back arc
Rock Type:
Sediment
Category:
Formation
Depositional Settings:
Fluviatile
Economic Aspects:
Road, building and constructional materials
Geographic Information
Coordinate:
99.517, 2.474
Region :
Kota Pematang Siantar
Province :
Sumatera Utara
Type Locality:
Kuala River, Pematangsiantar Quadrangle, Sumatera
Map Sheet:
Pematangsiantar
Map Scale:
1:250.000
Map Sheet number:
718
Distribution of Unit:
Pematangsiantar Quadrangle, Sumatera