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Hornfels

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A fine to medium grained granofels formed from contact metamorphism.
A fine-grained metamorphic rock composed of a mosaic of equidimensional grains without preferred orientation and usually formed by contact metamorphism. Porphyroblasts or relict phenocrysts may be present in the granoblastic matrix.

See Also: calc-silicate hornfels, pelitic hornfels, magnesian hornfels


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Classification of HornfelsHide

Sub-divisions of HornfelsHide

Pronounciation of HornfelsHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Age informationHide

Age range:
Eocene : 55.0 ± 0.8 Ma to 53.6 ± 0.8 Ma - based on data given below.
Sample ages:
Sample IDRecorded ageGeologic TimeDating method
153.6 ± 0.8 MaEocene
255.0 ± 0.8 MaEocene
Sample references:
IDLocalityReference
1Mourne Mts, Co. Down, Northern Ireland, UKEVANS, A. L., FITCH, F. J., & MILLER, J. A. (1973). Potassium-argon age determinations on some British Tertiary igneous rocks. Journal of the Geological Society, 129(4), 419-438.
2  "  "  "  "

Synonyms of HornfelsHide

Other Language Names for HornfelsHide

Internet Links for HornfelsHide

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