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To "clarify", in
petrology, minerals which are essential constituents of a rock (in this case, chlorite and actinolite) are listed A + B, and minerals which are commonly seen but are not essential components, are listed as +/- (in this case, albite and epidote).
It's fairly straightforward.
Rolinator (
talk)
02:20, 22 February 2008 (UTC)reply
In this case 'Greenstone' refers to the Cretaceous 'Spilsby Sandstone' which contains the green mineral
glauconite, the Cretaceous
Greensand of southern England is green for the same reason - here is a source for that
[1] page 28.
Mikenorton (
talk)
14:22, 5 February 2011 (UTC)reply
The kbar values are correct. It looks like the values were tweaked without propagating the change to the conversion template that follows. Fixed now. --
Kent G. Budge (
talk)
02:03, 27 July 2022 (UTC)reply