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Material name: CC4b
Synonyms: Silex Crétacé supérieur Centre - Sénonien.
Material (geologic): Late Cretaceous (Senonian) flint.

Detail of Senonian CC4b-flint
Foto: Jehanne Féblot-Augustins, 2005.

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Material description

Mode of occurrence: Small regular nodules.
Cortex: Worn, thin, light brown, smooth, transition sharp.
Colour: Brown (10YR 5/3).
Pattern: Featureless.
Appearance: Reasonably homogeneous material with a dull lustre, opaque, smooth, very medium-grained.
Structure: No particular structure.
Texture: Wackestone, with a packstone band below the cortex.
Matrix: Opaque.
Grains: 15-20 to 35 %, yellow to orangey yellow, rounded with high sphericity or irregularly shaped (mean size 150 µ).
Grain composition: Sponge spicules, bryozoan fragments, planispiral foraminifera, several acritarchs (80 µ); rare iron oxides and detrital quartz.
Further information: Click here for the original French description (opens in a new window), or here for more information on the attributes used in the description (use your browser's "BACK"-button to return here).
Citing: Information on citing this page can be found here.

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Les Côtes
Locality: Andert-et-Condon / Andert - Les Côtes, France, Ain department
Synonyms: Sampling site Bugey 52 after Féblot-Augustins
Geographical description: N/A
Geographical co-ordinates: east/x 858,4
north/y 2092,2
(Lambert zone II, NTF)

This corresponds roughly with
Lat. 45° 46' 51" N
Long. 005° 39' 36" E

Co-ordinate precision: The coordinates given were taken from a large-scale map, and won't be off by more than 50 metres.
The latitude/longitude coordinates are a direct transformation of these data on WGS84 and are accurate to the same level, so give or take an arc-second or two.

The location can be found on the 1:25 000 topographical map sheet 3231 E of the French Institut Géographique National.

Geology: According to the geological map, the substrate is of Oligocene age (unit 'g'). The flint istself originates in Late Cretaceous (Senonian) sediments and lies here in a secondary position.

Map of all sampled localities of Late Cretaceous flint in the Bugey (PDF, 54 KB, opens in new window).

Type of source: Secondary.
Other types of flint: Apart from the CC4b flint, quite a lot of other Late Cretaceous (Senonian) flints can be found here, CC2, CC3a, CC3b, CC4a as well as Early Cretaceous (Urgonian) material of the Ur-type
  Cortical flake of CC4d-flint
Foto: Jehanne Féblot-Augustins, 2005
Piece of shatter
Foto: Jehanne Féblot-Augustins, 2005


Last modified on:
November 15, 2005
Contents primarily by:
Jehanne Féblot-Augustins
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