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Barrika flint

Material name:	Barrika flint
Synonyms:	N/A
Material (geologic):	Late Cretaceous (Cenomanian to Maastrichtian) flint

Photo: John Rissetto, 2007

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Playa de Barrika

Locality:	Playa de Barrika, Basque Country/Euskadi, Spain
Synonyms:	N/A
Geographical description:	Exposure at foot of cliff on beach, around 3 m asl. Topographical map 1:25 000 37-IV Algrota. Geological map 1:50 000 37 Algrota (1975) 21-4. Length of identified source area: approx. 1200 meters. Thickness of chert bearing layers: approx. 30 meters. Type of source: primary.
Geographical co-ordinates:	Lat. 43° 24' N Long. 002° 59' 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.

	Photo: John Rissetto, 2007 Macrophoto of banded flint.	Photo: John Rissetto, 2007 Banded, slightly greenish flint.
	Photo: John Rissetto, 2007 Flake with numerous small bioclasts.	Photo: John Rissetto, 2007 Split rolled nodule.
	Photo: John Rissetto, 2007 Finely banded material.	Photo: John Rissetto, 2007 Block of strong-coloured flint.
	Photo: John Rissetto, 2007 Block of opaque, slightly veined flint.	Photo: John Rissetto, 2007 Detail of the same specimen.

Sample description:

Host Rock according to the 1:50 000 map from the Instituto Geologico Y Minero de España (IGME) (Spanish - English)
C 21-26 - Tramo calcareo - Calcarceous Level

Chert quality: high.
Form of nodules: amorphous, partly bedded.
Maximum dimensions of nodules: 40 cm.
Fracture pattern: conchoidal.

Last modified on:
December 13, 2007

Contents primarily by:
John Rissetto

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