5) shows that their shape does not allow distinguishing amphibolite from garnet amphibolite or from amphibole-biotite gneiss
2003), a long-standing uncertainty has been the relationship between the lower grade units, collectively termed the George River Metamorphlc Suite in the Bras d'Or terrane and the Green Head Group in southern New Brunswick, and the gneissic units, collectively known as the Bras d'Or Gneiss
and Brookville Gneiss
in the Bras d'Or and Brookville terranes, respectively.
contains greater amounts of Na and K, with lesser Ca and Mg.
The Strazek Moldanubicum is formed primarily by cordierite-biotitic gneiss
and migmatites, with biotitic and frequently migmatized gneiss
and with the intercalated beds of amphibolites, erlan gneiss
and magnesian limestone.
The hole intersected graphitic gneiss
to 38m, highly graphitic schist from 38 - 48m before passing back into graphitic gneiss
to the end of hole.
Potassium feldspars in the host gneiss
and unaltered xenoliths contain approximately 10 atomic percent Na, whereas those in altered blocks contain an order of magnitude less Na, suggesting Na was leached from them.
In low strain zones, it is recognized that the Inaluk dykes postdate an older gneissosity in the host gneiss
yet they were strained by the deformation that formed the regional gneissosity.
The Baths are in fact a composite of in situ concrete and load-bearing gneiss
from a local quarry.
Drill holes intersected continuous magnetite gneiss
of up to 200m apparent thickness.
Analogue sample 1-02--Amphibole-biotite gneiss
Providing and casting in situ cement concrete of required grade of trap / granite / gneiss
/ quartzite metal for R.
8 billion tonnes magnetite gneiss
at a grade of 18-25 percent iron.