1839 H. T. De la Beche Rep. Geol. Cornw. ii. 29These talcomicaceous slates of the Lizard. 
1860 Mayne Expos. Lex. ,Talcoquarzosus,..talcoquartzous. 
talco-
combining form 
Etymology: talcum 
 : talc and 
< talcochlorite >
: talcose and
< talcomicaceous >
< talcochlorite >
: talcose and
< talcomicaceous >