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Geological Map, Stratigraphic Column, and Geological Cross Sections of the Glen Achall area: UllapoolStudent No. 1102472
1km; 1000m
N300
200
0
-100
-200 -200
-100
0
100
200
300
1420m1365 96951510 9680
100
eastwest
A B
Met
res
abo
ve s
ea le
vel
A Q
P
F
F
Le
Ps
Ps
G
G
P
Le
Le
Q
A
PF
F
A
P
P
P
20 18 8 15 45 6 40
-200
-100
0
100
200
300
-100
0
100
200
300
Met
res
abo
ve s
ea le
vel
C D
1170m eastwest1475 9605 1565 9605
-200
-100
0
100
200
300
-100
0
100
200
300
A
Q
P
P
F
F
F
S
S
S
Lg
Lg
Lg
Le
Le
A
Ps
Ps
G
My
Series of forelandlithology horse structures
1510
20
A
A
A
Q
Q P
P
P
P
F
F
S
S
Lg
Lg
Le
A
My
My
Ps
PsG
G G
G
2870meastwest
1335 9575 1625 9560
-200
-100
0
100
200
300
-200
-100
0
100
200
300
-100
0
100
200
300
Met
res
abo
ve s
ea le
vel
E F
1810
18 2312
1620
30
1430m eastwest
1310 9440 1450 9445
A
Q
Q P
PFF
LgLg
GG
Ps300
200
100
0
-100
-200
300
200
100
0
-100
-200
Met
res
abo
ve s
ea le
vel
G H
12
1018 14
300
200
100
0
-100
-2001320 9475 1440 9465
Met
res
abo
ve s
ea le
vel
1270meastwest
A
Q
PF S
Lg
G
Ps I 300
200
100
0
-100
-200
I J
14 1822 20 20
20
Cross Section Legend
Geological boundary
Unconformity surface
Fault - with movement indication
Bedding orientation20
12
1km; 1000m
f
cl ff
cl
bcilccl
ml
ss
ss
ff
cc
bcil
cc
bcil
bcil
c
f
f
f
ml
ml ml
5
65
50
6232
3228
18
40 10
10
10
10
10
52
10105020
15
3025
40
506
14
326
24
30
28
2260
ApplecrossFm. (A)
Quartzite(Q)
Pipe Rock(P)
Fucoid Beds(F)
Eilean Dubh Fm.(Le)
Ullapool Gneiss(G)
Moine Psammite(Ps)
SyeniticIntrusion (I)
Mylonite
SalterellaGrit(S)
Ghrudaidh Fm(Lg)
Basaltic Dyke(B)
P
P
P
P
P
P
G
Q
Q
Q
A A
G
ALg
Ps
Ps
Ps
Le
Le
Le
F
S
S
F G
A
SLe
A
G
G
I
F S
F
Lg
B
B
A
A
Lg
Le
Le
Le
A
18
20
2010
2020
20
20
3020
20
15
20
10
10
32
32
40
18
45
156
12
20
20
10
15
18
20
15
14
25
10
30
18
15
12
60
3230
40
18
20
15
20
21
30
20
12
14
20
15
18
18
12
20
10
16
23 18
12
20
12
25
18
12
60
18
20
25
12
12
2025
22
12
28 20
20
20
40
45
14
10
12
10
10
820
18
3018
20
19
18
1518
14
22
20
24
50
18
20
12
8
22
14
12
10
ss10
bcil18
c28
cl32
f
10
50
10
ml5
15
Lithological Key
Limestone - Ghrudaidh Formation
Limestone - Eilean Dubh Formation
Salterella Grit
Fucoid Beds
Pipe Rock
Quartzite
Applecross Formation
Mylonite
Moine Psammites
Ullapool Gneiss
Syenite IntrusionI
G
Ps
My
A
Q
F
P
S
Le
Lg
BBasaltic Dyke
Light grey limestone, heavily fractured w/ quartz veins
Dark grey limestone with stylolitic silicate layers and quartz veins
Coarse grained grey-white quartz arenite
Dark grey siltstone interbedded with orange weathered calcareous mudstone (fossiliferous)
White and chemically altered pink medium grained quartz arenite;heavily bioturbated, locally cross bedded at base
White quartz arenite; varying grain sizes from pebbles to medium sand, cross bedded
Arkosic Arenite; varying grain sizes from pebble to medium sand, pink colour due to high K-feldspar content, pebbles composed mainly of quartzite and vein quartz
Moine psammites with mylonitic fabric and shear indicators (quartz fish and feldspathic mantled clasts)
Polymetamorphic grey quartzose psammites with green (orange weathered) bedding surfaces indicating chlorite; some shiny surfaces show aligned muscovites in semi-pelitic layers
Feldspathic gneiss with high abundance of K-feldspar; contains weakly aligned hornblende and local quartz megacrysts
Contains rhombic K-feldspars and has been deformed within Moine psammites, concordant with bedding, therefore likely to be a sill
Hydrothermally altered Basaltic Dyke, containing plagioclase, pyroxene, and retrogressive epidote/ chlorite
Geological Symbols
Legend
Boundaries
Bedding Orientation
Shear Sense Indicator
Bedding-Cleavage Intersection Lineation
Cleavage Plane
Crenulation Lineation
Plunging Synform
Plunging Antiform
Fold Axial Plane
Mineral Lineation
Fault Plane Orientation
Geological Boundary
Extensional Fault (ticks show downthrown block)
Reverse/ Thrust Fault (barbs on hanging wall)
Cross Sections A-B, C-D, G-H, I-J
Cross Section E-F
Stratigraphic Column
u/c
t
t
t
t
u/c
A
Q
P
FS
Lg
Le
GA
My
Ps
Multiple small scalehorse structures between Le and Gthrust nappes, composed of forelandlithologies; the lithologies are spatiallysporadic and do not outcrop as continuous nappes in the area
Neo
-Pro
tero
zoic
Cam
bri
an
Cross-bedded at unit base
Conglomeratic at unit base
Planar bedding at unit top