Stratigraphic range: Mid Jurassic-Berriasian ~170–140 Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N
Type
Geological formation
Unit of
Bahía Laura Group
Underlies
La Matilde & Pampa Rincón Formations
Overlies
Tobífera Formation
Area
~100,000 km2 (39,000 sq mi)
Lithology
Primary
Rhyolites, ignimbrites, lavas
Other
Agglomerates, tuffs
Location
Location
Patagonia
Coordinates
47°42′S70°18′W / 47.7°S 70.3°W / -47.7; -70.3
Approximate paleocoordinates
44°36′S29°30′W / 44.6°S 29.5°W / -44.6; -29.5
Region
Santa Cruz Province
Country
Argentina
Extent
Deseado Massif & Austral Basin
Type section
Named for
Cerro Chon Aike
The Chon Aike Formation is an extensive geological formation, present in the Deseado Massif in north-central Santa Cruz Province, Patagonia, Argentina. It covers an area of approximately 100,000 square kilometres (39,000 sq mi) and consists of rhyolitic volcanic rocks, particularly ignimbrites and lavas, with smaller amounts of agglomerates and tuffs.[1] Within dacitic rocks, plant fossils have been found.[2]
^Channing, Zamuner & Zúñiga 2007, Regional geological setting, pp. 401–402
^Estancia Bajo Pellegrini at Fossilworks.org
and 11 Related for: Chon Aike Formation information
The ChonAikeFormation is an extensive geological formation, present in the Deseado Massif in north-central Santa Cruz Province, Patagonia, Argentina...
overlies but sometimes intersperses with the Middle Jurassic ChonAikeFormation. The two formations are the subunits of the Bahía Laura Group. La Matilde is...
rock formations Baños del Flaco Formation, contemporaneous formation of the Mendoza Group in Chile ChonAikeFormation, contemporaneous formation of central...
leaving formations composed of the stronger rocks. This erosion was caused by the Pinturas River, fed by glacial runoff, which cut into the ChonAike Formation...
predominantly alkaline to tholeiitic in composition. Gerlache Strait Geology ChonAikeFormation Deception Islnd Geology Adelaide Island Geology Alexander Island...
Brennecke Formations and the N and Ellsworth-Whitmore terrane isolated granitoids. This units form part of the wider first-stage event (V1) of the ChonAike Province...
eruptions Types of volcanic eruptions Certain felsic provinces, such as the ChonAike province in Argentina and the Whitsunday igneous province of Australia...
Gastre fault system. The Magallenes Basin experienced rifting and the ChonAike province witnessed intraplate volcanism during the acceleration of the...
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