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Page 52
... andalusite - staurolite- biotite and sillimanite - staurolite - biotite , and are further characterised by the association of andalusite and garnet , in contrast to the kyanite - garnet association in Barrovian rocks and the andalusite ...
... andalusite - staurolite- biotite and sillimanite - staurolite - biotite , and are further characterised by the association of andalusite and garnet , in contrast to the kyanite - garnet association in Barrovian rocks and the andalusite ...
Page 53
... andalusite in many specimens , there is only occasional evidence of direct replacement of andalusite by sillimanite . These relationships can also be recognised in kyanite- bearing rocks subjected to Barrovian metamorphism , and when ...
... andalusite in many specimens , there is only occasional evidence of direct replacement of andalusite by sillimanite . These relationships can also be recognised in kyanite- bearing rocks subjected to Barrovian metamorphism , and when ...
Page 70
... andalusite content ap- proaches 25 per cent . The andalusite - bearing pelites occur widely in the aureole of the Belhelvie mass , and in the zone of hornfelses extending northwards from that intrusion , but there is no obvious ...
... andalusite content ap- proaches 25 per cent . The andalusite - bearing pelites occur widely in the aureole of the Belhelvie mass , and in the zone of hornfelses extending northwards from that intrusion , but there is no obvious ...
Contents
Chapter 1 Introduction | 1 |
FIGURES | 2 |
Chapter 2 Regionally metamorphosed rocks | 8 |
Copyright | |
20 other sections not shown
Common terms and phrases
Aberdeen area Aberdeen Formation Aberdeen mass abundant amphibole amphibolites analyses andalusite assemblages Belhelvie Belhelvie mass biotite bodies boundary cent channels clasts clay Clinterty Collieston Collieston Formation composition constituents contain cordierite corundum corundum-bearing country rocks Cove crystals Dalradian deformation deposits display drill holes dykes Ellon Formation evidence exposures feldspar felsite ferromagnesian fibrolite Figure fine-grained folds foliation garnet grains granitic granitic rocks hornfelses igneous rocks intrusion irregular lamprophyric layers lithological banding localities e.g. magnetic Magnification map area margin matrix meltwater metasedimentary metasediments migmatitic migmatitic granite minerals muscovite noritic occur olivine orthopyroxene outcrops pelites pelites and semi-pelites plagioclase Plane polarised light Plate porphyroblasts potash feldspar preferred orientation psammitic Quarry quartz recognised recrystallisation regionally metamorphosed rocks relatively relict rocks e.g. sand and gravel Sheet 77 area sillimanite Southern unit structures sub-unit suggest textural thermal metamorphism thick trend troctolitic ultramafic rocks valley variations xenoliths Younger Basic zone