BGS Rock Classification Scheme
Blastomylonite - A type of mylonitic-rock. Blastomylonites are formed where extensive recrystallisation and mineral growth accompanied deformation, resulting, for example, in ribbon textures in quartzose rocks. British Geological Survey Research Report RR/99/02, section 7.3.
| Code | BLSTMY |
|---|---|
| Description | Blastomylonite - A type of mylonitic-rock. Blastomylonites are formed where extensive recrystallisation and mineral growth accompanied deformation, resulting, for example, in ribbon textures in quartzose rocks. British Geological Survey Research Report RR/99/02, section 7.3. |
| Qualifiers | No qualifiers currently exist. |
| Definition | Highly foliated rock with primary cohesion & fine grained (0.032-0.25mm) matrix (protolith & % porphyroblasts undefined) in which extensive recrystallisation & new mineral growth accompanied/post-dated ductile deformation, mylonite variant |
| Linked data | http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/BLSTMY |
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.