Embedded Files
No.126
No.126
14745
14745
Balquhidder
Grt zone
ppl 1 mm
ppl 1 mm
xpl 1 mm
xpl 1 mm
Simple twin
ppl 8 mm
ppl 8 mm
xpl 8 mm
xpl 8 mm
No.127
No.127
19945
19945
"Epidiorite" Act-saussurite schist
Dunoon, Hunter's Quay (N of pier) (Argyllshire)
ppl 8 mm
ppl 8 mm
xpl 8 mm
xpl 8 mm
No.128
No.128
148488
148488
And-Sil rock
Clashnarae Hill, Aberdeen
Sil zone [Buchan]
ppl 2 mm
ppl 2 mm
Parallel grey lines in Bt
xpl 2 mm
xpl 2 mm
Fibrolite (to the S)
xpl 1 mm
xpl 1 mm
ppl 8 mm
ppl 8 mm
xpl 8 mm
xpl 8 mm
xpl 2 mm
xpl 2 mm
Ms defining Pl grain boundaries
ppl 2 mm
ppl 2 mm
xpl 2 mm
xpl 2 mm
Ms in Bt
xpl 2 mm
xpl 2 mm
A few separate Ms grains (indicated by slightly different extinction angles)
ppl 2 mm
ppl 2 mm
xpl 2 mm
xpl 2 mm
Twinning
xpl 2 mm
xpl 2 mm
Intergrowth emanating from the twinned grain
ppl 8 mm
ppl 8 mm
xpl 8 mm
xpl 8 mm
ppl 2 mm
ppl 2 mm
xpl 2 mm
xpl 2 mm
Symplectites
ppl 2 mm
ppl 2 mm
xpl 2 mm
xpl 2 mm
Pl in centre
xpl 2 mm
xpl 2 mm
Simple twin (East)
xpl 2 mm
xpl 2 mm
With sensitive tint
(The eastern grain is length fast)
ppl 2 mm
ppl 2 mm
xpl 2 mm
xpl 2 mm
Pl sericitisation on the right
xpl 2 mm
xpl 2 mm
Intergrowths
xpl 1 mm
xpl 1 mm
No.129
No.129
93513
93513
Chiastolite schist
R. Fiddich, Auchindoun Castle, Banffshire
And zone [Buchan]
ppl 8 mm
ppl 8 mm
xpl 8 mm
xpl 8 mm
(Rainbow of Ms)
No.130
No.130
121995
121995
Ab schist
Lomondside, Argyll
Grt zone
ppl 2 mm
ppl 2 mm
Bt → Chl
xpl 2 mm
xpl 2 mm
ppl 1 mm
ppl 1 mm
Ep (?) next to euhedral Tur
xpl 1 mm
xpl 1 mm
Blue and pale bile-yellow birefringence
xpl 1 mm
xpl 1 mm
Straight extinction
ppl 2 mm
ppl 2 mm
Rectangular grain in centre
xpl 2 mm
xpl 2 mm
ppl 2 mm
ppl 2 mm
Grt → Chl
xpl 2 mm
xpl 2 mm
xpl 1 mm
xpl 1 mm
ppl 8 mm
ppl 8 mm
xpl 8 mm
xpl 8 mm
ppl 2 mm
ppl 2 mm
Prismatic Ep
xpl 2 mm
xpl 2 mm
xpl 2 mm
xpl 2 mm
ppl 2 mm
ppl 2 mm
Grt & Tur
xpl 2 mm
xpl 2 mm
ppl 2 mm
ppl 2 mm
ppl 1 mm
ppl 1 mm
Ep (?)
xpl 1 mm
xpl 1 mm
xpl 1 mm
xpl 1 mm
No.131
No.131
28627
28627
Sil-And-Crd hornfels
1 ft from granite, railway E of Ferry Station, Ballachulish
Sil zone
ppl 5 mm
ppl 5 mm
And with pink (Fe-rich) core
xpl 5 mm
xpl 5 mm
ppl 1 mm
ppl 1 mm
xpl 1 mm
xpl 1 mm
Prismatic Sil
xpl 1 mm
xpl 1 mm
Sensitive tint
ppl 5 mm
ppl 5 mm
Parallel lines of Ox
xpl 5 mm
xpl 5 mm
ppl 1 mm
ppl 1 mm
xpl 1 mm
xpl 1 mm
Straight extinction
ppl 1 mm
ppl 1 mm
xpl 1 mm
xpl 1 mm
No.132
No.132
88913
88913
Bt-Ms hornfels
Glen Duror, near Kentallen
Bt zone
ppl 1 mm
ppl 1 mm
Chl
xpl 1 mm
xpl 1 mm
ppl 5 mm
ppl 5 mm
xpl 5 mm
xpl 5 mm
No.133
No.133
88917
88917
Grt-Crd hornfels
Glen Duror, near Kentallen, Argyll
Grt zone
ppl 5 mm
ppl 5 mm
xpl 5 mm
xpl 5 mm
ppl 2 mm
ppl 2 mm
xpl 2 mm
xpl 2 mm
ppl 0.5 mm
ppl 0.5 mm
xpl 0.5 mm
xpl 0.5 mm
No.134
No.134
32945
32945
Grt-iferous Mca schist
¼ m S of hotel, Inverarnan, Glen Falloch
Grt zone
ppl 5 mm
ppl 5 mm
Green Chl grains
xpl 5 mm
xpl 5 mm
Ab (simple twin)
ppl 5 mm
ppl 5 mm
xpl 5 mm
xpl 5 mm
ppl 5 mm
ppl 5 mm
xpl 5 mm
xpl 5 mm
Very Qz-rich
No.135
No.135
13729
13729
Bt-Pl-Or hornfels
Monadh Driseig, Ben Cruachan
Bt zone
ppl 1 mm
ppl 1 mm
xpl 1 mm
xpl 1 mm
Exsolution (?) in the bottom centre Fsp grain
ppl 1 mm
ppl 1 mm
xpl 1 mm
xpl 1 mm
Symplectites (N and NW of centre)
ppl 1 mm
ppl 1 mm
xpl 1 mm
xpl 1 mm
Kfs (wavy twinning)
ppl 5 mm
ppl 5 mm
xpl 5 mm
xpl 5 mm
ppl 1 mm
ppl 1 mm
xpl 1 mm
xpl 1 mm
Zrn(?) in Bt
xpl 0.5 mm
xpl 0.5 mm
Symplectite (SE)
No.136
No.136
126532
126532
Crd-And-Sil-Crn-Spl-Bt-Ksp hornfels
Monadh Driseig
Sil zone
ppl 2 mm
ppl 2 mm
Square-ish pseudomorph (?)
xpl 2 mm
xpl 2 mm
Yellow birefringent grains (Czo ?)
ppl 2 mm
ppl 2 mm
xpl 2 mm
xpl 2 mm
xpl 2 mm
xpl 2 mm
ppl 5 mm
ppl 5 mm
xpl 5 mm
xpl 5 mm
ppl 1 mm
ppl 1 mm
xpl 1 mm
xpl 1 mm
Sil in centre
xpl 1 mm
xpl 1 mm
Sensitive tint (length slow Sil)
No.137
No.137
41677
41677
Bt granulite
Near Portaskaig, Islay (Boulder Bed. Stp)
Bt zone
ppl 5 mm
ppl 5 mm
xpl 5 mm
xpl 5 mm
ppl 1 mm
ppl 1 mm
ppl 1 mm
ppl 1 mm
xpl 1 mm
xpl 1 mm
ppl 2 mm
ppl 2 mm
xpl 2 mm
xpl 2 mm
Perthitic texture
ppl 2 mm
ppl 2 mm
xpl 2 mm
xpl 2 mm
ppl 1 mm
ppl 1 mm
xpl 1 mm
xpl 1 mm
No.138
No.138
41680
41680
Sericite schist
80 yds E of Clèit nan Luath, Port nan Gallan, Islay
Chl zone
ppl 5 mm
ppl 5 mm
xpl 5 mm
xpl 5 mm
ppl 2 mm
ppl 2 mm
xpl 2 mm
xpl 2 mm
No.139
No.139
14588
14588
Grt-Bt-Chl schist
Near Kirkmichael, Perthshire
ppl 5 mm
ppl 5 mm
(!!)
xpl 5 mm
xpl 5 mm
ppl 5 mm
ppl 5 mm
xpl 5 mm
xpl 5 mm
No.140
No.140
32802
32802
Chl-Ms schist
Hill above Lochearnhead
Chl zone
ppl 5 mm
ppl 5 mm
xpl 5 mm
xpl 5 mm
Some areas are more Qz-rich
ppl 5 mm
ppl 5 mm
xpl 5 mm
xpl 5 mm
Undulose extinction
ppl 5 mm
ppl 5 mm
xpl 5 mm
xpl 5 mm
xpl 2 mm
xpl 2 mm
No.141
No.141
32804
32804
Grt-Chl-sericite schist
E. slope Meall a Mhadaidh, N. of upper L. Earn
Grt zone
ppl 5 mm
ppl 5 mm
xpl 5 mm
xpl 5 mm
Curving around Grt (N)
ppl 2 mm
ppl 2 mm
xpl 2 mm
xpl 2 mm
Grains emanating from Grt
ppl 2 mm
ppl 2 mm
xpl 2 mm
xpl 2 mm
ppl 1 mm
ppl 1 mm
xpl 1 mm
xpl 1 mm
xpl 2 mm
xpl 2 mm
No.142
No.142
19933
19933
Ms-Bt-Ab schist
At upper bridge, Glen Fyne
Bt zone
ppl 1 mm
ppl 1 mm
xpl 1 mm
xpl 1 mm
High relief, inclined extinction (= ?)
ppl 5 mm
ppl 5 mm
xpl 5 mm
xpl 5 mm
ppl 2 mm
ppl 2 mm
xpl 2 mm
xpl 2 mm
Bright green birefringent accessory
ppl 2 mm
ppl 2 mm
xpl 2 mm
xpl 2 mm
Kfs?
ppl 2 mm
ppl 2 mm
Bt N of centre
xpl 2 mm
xpl 2 mm
ppl 2 mm
ppl 2 mm
Bt pleochroism (now dark brown)
xpl 2 mm
xpl 2 mm
No.143
No.143
46596
46596
Grt-Bt-Ms schist
30 yds above bridge, River Orchy
Grt zone
ppl 5 mm
ppl 5 mm
Altered Grt
xpl 5 mm
xpl 5 mm
Randomly oriented Bt grains
No.144
No.144
G175
G175
Ky-Grt-Mca schist
Slopes below Loch Brandy, Glen Clova
Sil zone
ppl 2 mm
ppl 2 mm
Fibrolite (associated with some streaks of Bt ∵ epitaxis)
xpl 2 mm
xpl 2 mm
No.145
No.145
44436
44436
Grt-Sil-Ms gneiss (Sil → white Mca)
Coire nam Muc, Ardgour
Sil zone
ppl 5 mm
ppl 5 mm
xpl 5 mm
xpl 5 mm
Sil → white Mca (incomplete)
ppl 1 mm
ppl 1 mm
xpl 1 mm
xpl 1 mm
Symplectites & sericitisation
ppl 1 mm
ppl 1 mm
50/50 Ms/Bt grain
xpl 1 mm
xpl 1 mm
ppl 2 mm
ppl 2 mm
xpl 2 mm
xpl 2 mm
Ky (?) → white Mca (incomplete)
xpl 2 mm
xpl 2 mm
No.146
No.146
90499
90499
Thermally metamorphosed Ky-Grt schist (Ky, And, Grt, Crd) (Fsp repl. Mca)
Gorge ¼ m SE of Auchallater, Braemar
Ky zone
ppl 1 mm
ppl 1 mm
Ky with a rim
xpl 1 mm
xpl 1 mm
ppl 1 mm
ppl 1 mm
xpl 1 mm
xpl 1 mm
Perfect twins on the left, asymmetric pinched-out twins on the right
ppl 1 mm
ppl 1 mm
ppl 1 mm
ppl 1 mm
Pinched-out twins
ppl 2 mm
ppl 2 mm
ppl 2 mm
ppl 2 mm
More pinched-out polysynthetic twins
ppl 1 mm
ppl 1 mm
xpl 1 mm
xpl 1 mm
Low birefringence rim around Ky
ppl 2 mm
ppl 2 mm
xpl 2 mm
xpl 2 mm
ppl 2 mm
ppl 2 mm
Yellow grains (St ?)
xpl 2 mm
xpl 2 mm
Crd in NE; unidentified grain in the bottom centre
xpl 2 mm
xpl 2 mm
Undulose extinction (parallel to the grain's diagonal)
ppl 2 mm
ppl 2 mm
xpl 2 mm
xpl 2 mm
xpl 2 mm
xpl 2 mm
i.e., not straight extinction
xpl 2 mm
xpl 2 mm
With sensitive tint
No.147
No.147
91225
91225
Banchory gneiss (Grt-Sil)
Hill of Goauch, Banchory
Sil zone
ppl 2 mm
ppl 2 mm
xpl 2 mm
xpl 2 mm
A little fibrolite (yellow / purple birefringence) remains in the centre. Most altered to a micaceous shimmer aggregate
No.148
No.148
93505
93505
St schist with Chl
Mill of Botary, Burn of Ardonald, near Cairnie
St zone
ppl 5 mm
ppl 5 mm
xpl 5 mm
xpl 5 mm
ppl 5 mm
ppl 5 mm
Much St
xpl 5 mm
xpl 5 mm
No.149
No.149
93502
93502
Much altered Ky schist
500 yds W of Newtown Cottage, Burn of Tervie, Glen Rinnes
Ky zone
ppl 5 mm
ppl 5 mm
xpl 5 mm
xpl 5 mm
Ky → shimmer aggregate (incomplete)
ppl 5 mm
ppl 5 mm
xpl 5 mm
xpl 5 mm
ppl 5 mm
ppl 5 mm
Streaky dustiness
xpl 5 mm
xpl 5 mm
A darker bundle inside the central grain
A replaced square grain to the SW
xpl 5 mm
xpl 5 mm
With sensitive tint
Length fast partially-altered grains
ppl 2 mm
ppl 2 mm
Chl to NE
xpl 2 mm
xpl 2 mm
Sericitisation
ppl 5 mm
ppl 5 mm
xpl 5 mm
xpl 5 mm
xpl 5 mm
xpl 5 mm
Altered Ky?
No.150
No.150
51428
51428
Bt schist
Battery, Boyndie Bay, Banffshire
Bt zone
ppl 1 mm
ppl 1 mm
xpl 1 mm
xpl 1 mm
ppl 5 mm
ppl 5 mm
xpl 5 mm
xpl 5 mm
xpl 2 mm
xpl 2 mm
ppl 2 mm
ppl 2 mm
xpl 2 mm
xpl 2 mm
xpl 1 mm
xpl 1 mm
Anomalous grey-purple birefringence
xpl 1 mm
xpl 1 mm
ppl 1 mm
ppl 1 mm
ppl 1 mm
ppl 1 mm
Pleochroic
xpl 1 mm
xpl 1 mm
With sensitive tint
xpl 1 mm
xpl 1 mm
With sensitive tint
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