Prato Tao Fm
Period:
Neogene
Age Interval:
Middle Miocene (6)
Province:
Sibumasu: Central Plain
Type Locality and Naming
Phitsanulok Basin (northern Central Plain) 6th (upward) of 8 formations in the Phitsanulok Gr.
Synonym: หมวดหินประดเู่ฒ่า
[Figure: Map showing the Tertiary basins of Thailand, with Phetchabun basin highlighted. The solid black lines onshore are the principal rivers draining Northern and Central Thailand and the Khorat Plateau (Morley and Racey, 2011, page 224).]
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Lithology and Thickness
Alluvial plain, clay, minor fluviatile sandstone. 1400 m
Lithology Pattern:
Clayey sandstone
Relationships and Distribution
Lower contact
Overlies the Chum Saeng Fm
Upper contact
Overlain by the Yom Fm
Regional extent
Phitsanulok Basin (northern Central Plain) is the largest individual rift basin complex in Thailand. Sukhothai and Kamphaeng Phet provinces.
GeoJSON
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Fossils
Age
Middle Miocene
Age Span:
Beginning stage:
Langhian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
15.99
Ending stage:
Tortonian
Fraction up in the ending stage:
0.0
Ending date (Ma):
11.63
Depositional setting
Alluvial
Depositional pattern:
Additional Information
Compiler:
Wen Du - modified from Christopher K. Morley & Andrew Racey, 2011, Chapter 10 Tertiary stratigraphy in: Ridd, M.F., Barber, A.J., and Grow, M.J., editors, The Geology of Thailand, Geol. Soc. of London.; and Lexicon of Stratigraphic Names of Thailand of 2013.