Page 17 - elizondo1953
P. 17
ooda 1:1re split into t,bin
to thick bedded imi ts, coo,posed bf a:n alternation o:f' gray, fine ·to merl:tum:1
quarh, p:robahly of hydrothermal origin, oroas-cut th0 schists in
petrographic
Oonohoidal tractuN
Wav,y ex,::.1n1.1c,n
Inclueiont
lrragu1a.r outlines
Fractured
Law positive relief'
Un:tn::dal positive
High hi~efringenc~
Parall6l extintion
St:i. .. a:b:;, i:i:l:UidOlvS
Mtll!liCOVitea 40 pe:r cent gra::lns Twist 1ng or e:re:l na
(p.!7!,rtly aericita)
Biuial negative
Parallel extintion
Opaque
Small 2V
Op1Jq1le
Euh.edral f ON!S
Graen mioaoeotUll;i alteration
Chlorite 9
biotite
