Fabric

TBY D

Clay: 
Reddish-brown, silty, almost opaque matrix. The silty component contains quartz (dominant), basalt, magnetite, olivine, plagioclase, iddingsite and some limestone.
Temper: 
The non-plastic assemblage contains rounded to sub-angular basalt grains (more than 5%, predominant), chert (less than 1%), weathered limestone (very few) with the addition of quartz and volcanic minerals (olivine, plagioclase, iddingsite). The prominent feature of this group is the occurrence of straw negatives (3%). The temper is poorly sorted and comprises more than 10% of the groundmass.
Characteristic Inclusions: 
Basalt
Chert
Limestone
Quartz
Olivine
Plagioclase
Iddingsite
Mixed Clay: 
No
Mixed Temper: 
No