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Ojo Guareña

Material name: Ojo Guareña
Synonyms: N/A
Material (geologic): Upper Cretaceous (Lower Turonian to Lower Coniacian) chert

Ojo Guarena chert
Photo: John Rissetto, 2007

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Ojo Guareña
Locality: Ojo Guareña, Burgos, Spain
Synonyms: N/A
Geographical description: Exposure in mountainous terrain around 814 m asl.
Topographical map 1:25 000 84-IV Espinosa de los Monteros.
Geological map 1:50 000 84 Espinosa de los Monteros (1976) 19-06 .

Length of identified source area: approx. 500 meters.
Thickness of chert bearing layers: approx. 25 meters.
Type of source: primary.

Geographical co-ordinates: Lat. 43° 09' N
Long. 003° 40' W
(Mapdatum WGS 84)
Co-ordinate precision: The coordinates are given to the nearest minute. If you need more detailed information about this location, please contact the author.
  Flake of chert
Photo: John Rissetto, 2007
Chert with less well-silicified patches
size: 39 mm
Sample description: Host Rock according to the 1:50 000 map from the Instituto Geologico Y Minero de España (IGME) (Spanish - English)
C 0-1, 22-23 - Margas y calizas arcillosas - Marls and clayey limestone

Chert quality: medium.
Form of nodules: amorphous.
Maximum dimensions of nodules: 20 cm.
Fracture pattern: conchoidal.


Last modified on:
December 13, 2007
Contents primarily by:
John Rissetto
Comments to: