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Playa de Sonabia

Material name: Playa de Sonabia
Synonyms: N/A
Material (geologic): Early Cretaceous ("Gallic", Middle to Upper Albian) chert

Close-up of Sonabia chert
Photo: John Rissetto, 2007

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Playa de Sonabia
Locality: Playa de Sonabia, Cantabria, Northern Spain
Synonyms: N/A
Geographical description: Exposure in coastal cliffs, approx. 17 m asl.
Topographical map 1:25 000 36-IV Castro Urdiales.
Geological map 1:50 000 36 Castro Urdiales (1982) 20-04.

Length of identified source area: approx. 1500 meters.
Thickness of chert bearing layers: approx. 45 meters.
Type of source: primary.

Geographical co-ordinates: Lat. 43° 25' N
Long. 003° 20' 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 chert
Photo: John Rissetto, 2007
Small nodule of grey, opaque chert.
white chert
Photo: John Rissetto, 2007
Piece of white material.
  coloured chert
Photo: John Rissetto, 2007
Multicoloured chert.
Sample description: Host Rock according to the 1:50 000 map from the Instituto Geologico Y Minero de España (IGME) (Spanish - English)
C 23-16 — Calizas arcillosas con espiculas - Limestone clay with spicules

Chert quality: low.
Form of nodules: amorphous.
Maximum dimensions of nodules: 40 cm.
Fracture pattern: conchoidal with fractures along longitudinal planes.


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