Of 61 K-feldspar megacrysts examined from one granodiorite pluton, local shearing has rendered nine triclinic with γ <88.2° and twelve triclinic with γ >89.3°. On a Δbcvs. Δα*γ* plot, both triclinic groups show an ordering trend parallel to the ‘one-step’ trend of albite; there is a discontinuity between these groups across which it is postulated that γ changes by about 1 ° with no change in order.

You do not have access to this content, please speak to your institutional administrator if you feel you should have access.