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Material name: Urbasa
Synonyms: N/A
Material (geologic): Paleocene (Danian) chert

Detail of Paleocene chert
Photo: John Rissetto, 2007

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Locality: Parque Natural Urbasa, Navarra, Spain
Synonyms: N/A
Geographical description: Exposure along road at the foot of a mountain, around 823 m asl.
Topographical map 1:25 000 114-III Altsasu/Alsasua.
Geological map 1:50 000 114 Alsasua (1987) 24-07.

Length of identified source area: approx. 75 meters.
Thickness of chert bearing layers: approx. 20 meters.
Type of source: primary.

Geographical co-ordinates: Lat. 42° 52' N
Long. 002° 11' 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.
  Grey danian flint
Photo: John Rissetto, 2007
Grey Paleocene (Dano-Montian) chert with slight banding.
size: 43 mm
Sample description: Host Rock according to the 1:50 000 map from the Instituto Geologico Y Minero de España (IGME) (Spanish - English)
32 - Dolomias y calizas dolomiticas - Dolomite and dolomitic limestone

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


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