BGS Rock Classification Scheme

Siltstone, hornfelsed

Code	HFSLST
Description	Siltstone, hornfelsed
Qualifiers	hornfelsed
Definition	Metasediment rock, siltstone protolith, original particles >50% or predominantly 0.004-0.032mm. Hard, granoblastic rock, recrystallised by contact meta, lacks parting planes, pre-existing features identified by lithological heterogeneities; a granofels.
Linked data	http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/HFSLST

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CAVEAT

"Thumbnail" definitions attached to some of the table entries are an interim attempt to provide simple short descriptions of the "unqualified" rock types presented within the BGS Rock Classification Scheme. Every effort has been made to ensure accuracy and consistency but minor contradictions or omissions might be present. The BGS welcomes any feedback pointing out such minor imperfections and/or providing constructive comment and suggestions for improvement of the definitions. In the first instance such feedback should be directed to Dr Tim McCormick.