Chanthaburi Gr
Period:
Triassic
Age Interval:
Late Triassic (12)
Province:
SE Thailand: Klaeng Zone
Type Locality and Naming
Informal name, for sequence close to Cambodian border in Trai and Chanthaburi provinces. SE Thailand (Sukhothai Zone extension). Consists of 3 formations: lower = Noen Po Fm, middle = Pong Nam Ron Fm, upper = Noen Pu Yai Yua Fm. Named by Ridd (1978), subdivided by Chaodumrong (1992).
Synonym: กลุ่มหินจันทบุรี; Chantaburi Gr
[Figure: Generalized distribution of marine Triassic sedimentary rocks in Thailand (in purple) (modified after Mantajit 1999, by Chonglakmani C., 2011, page 138).]
Lithology and Thickness
Sequence of dark-grey mudstones and greywackes with turbidite characteristics. Ca. 500 m total.
Lithology Pattern:
Sandy claystone
Relationships and Distribution
Lower contact
Not given
Upper contact
Not given
Regional extent
NW–SE belt close to the Cambodian border in Trat and Chanthaburi Provinces. SE Thailand (Sukhothai Zone extension).
GeoJSON
null
Fossils
Age
Implied by Fig. 6.2 in Chonglakmani (2011) to span approximately the middle Ladinian through Norian.
Age Span:
Beginning stage:
Ladinian
Fraction up in beginning stage:
0.5
Beginning date (Ma):
239.25
Ending stage:
Rhaetian
Fraction up in the ending stage:
0.0
Ending date (Ma):
209.56
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Wen Du - modified from- Chonglakmani, C.P., 2011, Chapter 6 Triassic in Ridd, M.F., Barber, A.J., and Grow, M.J., editors, The Geology of Thailand, Geol. Soc. of London.；Lexicon of Stratigraphic Names of Thailand of 2013.