Pyroxene tends to retrogress to actinolite-cummingtonite or chlorite.
Eclogite may completely retrogress to amphibolite or granulite during exhumation.
The same tendencies exist in human nature, and this is a deeply ingrained flaw; the propensity to retrogress is very deep and it has to be controlled.
But instead of making progress in those fields we are retrogressing and, so long as that is the position, it is the measure of our failure.
Beyond this point we are retrogressing towards a good life, not progressing towards it.
Deformation within the heavily retrogressed gneiss is very heterogeneous in character and possibly governed by the (variable) orientation of gneissic foliation with respect to the extension direction.
Only two children retrogressed (those in the cells below the diagonal).
Any garnet in these more mafic gneisses is generally larger and often slightly retrogressed.
