geologic map of the creedmoor 7.5-minute quadrangle, granville ...
North Carolina Geological Survey Open File Report 2016-18
Jenny Kelvington, Executive Director Kenneth B. Taylor, State Geologist
78 37' 30"
78 45' 00"
36 07' 30"
36 07' 30"
DESCRIPTION OF MAP UNITS
Trcs/si2 84
82
Qal
82 22
75
15
82
26
60
Qal: Quaternary alluvium: Unconsolidated, poorly-sorted and poorly stratified, tan to light gray deposits of gravel, sand, silt, and clay. Similar to stratified terraces along streams.
Qal
INTRUSIVE ROCKS
1
Jd
14
50
Qal
72
Trcs/si2
10
8
72
Jd
Jurassic
Jd
Quaternary
SURFICIAL UNIT
Jd
SEDIMENTARY ROCKS Trcc - conglomerate: reddish-brown to dark brown, irregularly bedded, poorly sorted, cobble to boulder conglomerate. Muscovite is rare to absent in the very coarse-grained to gravelly matrix. An arbitrary cut-off of greater than 50 percent conglomerate distinguishes this unit from the Trcs/c facies. Clasts are chiefly miscellaneous felsic and intermediate metavolcanic rocks, quartz, epidote, bluish- gray quartz crystal tuff, muscovite schist, and rare meta-granitic material. Maximum clast diameters are in excess of 2 m along Haleys Branch east of the RDU airport.
Trcc
Trcs/si2
85 85
5
Trcs/c - sandstone with interbedded conglomerate: reddish-brown to dark brown, irregularly bedded, poorly sorted, coarse-grained to pebbly, muddy lithic sandstones with interbedded pebble to cobble conglomerate. Muscovite is rare to absent in the matrix. Well-defined conglomerate beds distinguish this unit from conglomerate basal lags of Trcs. An arbitrary cut-off of less than 50 percent conglomerate distinguishes this unit from the Trcc conglomerate facies. Conglomerate beds are channel-shaped and scour into the underlying sandstone beds. Unit grades eastward into Trcc.
Trcs/c
Triassic
Qal
Qal
Trcs/si2
Trcs - interbedded sandstone and pebbly sandstone: reddish-brown to dark brown, irregularly bedded to massive, poorly to moderately sorted, medium- to coarse-grained, muddy lithic arkoses, with occasional, matrix-supported granules and pebbles or as 1-5 cm thick basal layers. Muscovite is common to absent. Occasional bioturbation is usually surrounded by greenish-blue to gray reduction halos. Beds are tabular, 1-3 meters thick, with good lateral continuity. Unit grades eastward into Trcs/c.
Trcs
Trcs/si2 - sandstone with interbedded siltstone: Cyclical depositional sequences of whitish-yellow to grayish-pink to pale red, coarse- to very coarse-grained, trough cross-bedded lithic arkose that fines upward through yellow to reddish-brown, mediumto fine-grained sandstone, to reddish-brown, burrowed and rooted siltstone. Bioturbation is usually surrounded by greenish-blue to gray reduction halos. Coarse-grained portions contain abundant muscovite, and basal gravel lags consist of clasts of quartz, bluish-gray quartz crystal tuff, and mudstone rip-ups.
Trcs/si2
Qal Jd
14
67
Jd - diabase dikes and sills: Steeply dipping to vertical dikes and horizontal to shallowdipping sills of gray to bluish-black, fine- to coarse-grained, locally porphyritic plagioclase diabase, that may be olivine-bearing. Solid lines where observed, dashed where inferred, and dotted where concealed. Red circles indicate areas of abundant float inferred to be near original location.
Trcs/si2
69
25
37
METAMORPHIC ROCKS Trcs/c 71 67
Qal
12
Qal
Qal
Jd
65
Trcs/si2
Jd
Qal
86 70 76
Trcs/si2
Carolina Terrane
56
78
30
Jd
Trcs/c
Jd
LAK E
D
Jd
65
Jd
Jd
6
78
78
87 10 72
10
5
38
45
37
66
77 75
D
80
FALLS LAKE
Jd
13 65 4
15
7
30
20
JO
71
Trcs/c
12
Jd
44
19 6
80
18 78
19 86
80
33
19
74
85
22
72
19
9
7
19
4
72
83
12
42
72 8 3
79
85
6
5
54
Trcs/c
86
85
45 55
54
61
42
67
89
9
9
12
46
57
57
U
U
61
52 60
D 82 55
67
33
47
26 70 72
56
47 75
63
65
82
74
42
52
41
50
57
28
47
U
CZfu
51
CZfkq
41
33 34 48
U
63
36 40
65 63
50
CZfs
CZfua
37
51
52 44
53
47
62
40
48
CZfs
52
35
58 31
30
28
49
8 27
36
53
55
34
21
38
CZfut
39 45
70
33
60 34
Jd CZfut Jd 26
33
14
25
23
28
CZpx - Beaverdam metapyroxenite: Greenish-black, medium- to coarse-grained, massive, hypermelanocratic (CI greater than 90) metapyroxenite with minor amounts of talc, magnetite and chlorite.
CZfs
CZfs - Falls Lake schist: Silvery-gray to black, fine- to medium-grained, well-foliated, white mica ± biotite ± garnet ± chlorite schist to gneiss.
CZfu
CZfu - ultramafic rocks (undivided): Variably altered ultramafic rocks including metapyroxenite, actinolite-chlorite schist, and talc schist.
CZfut
CZfut - talc schist: White to gray talc-tremolite schist, talc-chlorite schist, and soapstone. Rhombohedral cavities suggest former presence of a carbonate mineral (ankerite?).
22
20
28
15 19
CZfua - actinolite rock and actinolite-chlorite schist: Dark green, schistose to almost massive, splintery rock composed of actinolite and varied amounts of chlorite; minor amounts of talc and magnetite octrahedra are common.
CZfua
CZfa - amphibolite: Dark gray to black, fine- to coarse-grained, well-foliated dikes generally parallel to foliation within country rock. CZfus - serpentinite: Pale greenish-gray, fine-grained, and massive to moderately-foliated; contains fibrous tremolite, clots of magnetite, and minor amounts of talc and dark green, unfoliated, chlorite actinolite rock. CZfkq - kyanite quartzite: Silver-white, fine- to medium-grained, foliated, white mica + kyanite quartzite + opaque minerals.
39
23
CZfut
23
CONTACTS
20
CZfu
22 7
15 15
9
CZfu 26
50
29
12 13
Lithologic contacts - Solid where location known, dashed where inferred, dotted where concealed.
14 15 2
CZfut
22
FA LL S
CZpx
CZfkq
A'
35
21
CZgb - Beaverdam gabbro and metaproxenite: Black and white to greenish black, fine- to medium-grained, unfoliated to well-foliated, melanocratic to hypermelanocratic (CI greater than 40) gabbro to metapyroxenite.
CZfus
35
25
CZfa 27 27
27
23 53
CZfus 20
43
21
17
23
62
32
28
81
60
55
CZgb
32
52
31
42 18
CZfa
32
16
CZfua
CZfa
31
67
19
21
CZfa
44
49
72
40 41
40
32
36
42
28
37
66
38
62
41
59 32
57 36
CZfu
20
46
51
CZfu
CZfu
32
44
38
48
36
48
42
21
47
20
53
50
42
54
52 50
60
44
55
49
39
40
48
U
CZfa
41
42
CZqdi - Beaverdam blue quartz diorite: Buff to green and white, coarse-grained, unfoliated, mesocratic (CI less than 40) biotite + hornblende metagranodiorite to metadiorite, containing conspicuous crystals of blue quartz.
CZfa
CZfu
58
62
45
D
47
35
36
59
42
57
72
71
45
54
51
67
CZfu
42
67
35
47
70
72 58
61
75
67
42
47 36
CZcf
Trcc
60 87
36
CZdi
42
68
68
70
69
Jd
36 00' 00"
52
52 62 70
52
65
CZqdi
75
CZfua
67
70
68
67 51 48
81
O
CZpx
40
62
69
27
55
52
73
U
68
CZdi
56 59
D
CZpx
47 58
47
50
16
54
57
D
D
74 67
36
42
Trcc
15
22
66
54
Trcs/si2
Trcs
42
70
Jd
8
Jd 42
Trcc
65
27
81
N
R
Jd
44
56
47
Trcc
70
36
LE ES VI LL E
70 67
85 81
65
BO ES
46
62
88
76
68
77
Jd
Jd
54 61 80
CZqdi
87 45 75
35
84
D
79
30 75
A
55
Trcc
14
82
35
66 75
60
21 13
53
U
26 48
41
12
Trcs
58
32
73
82
42
29
88
60
19
52
65
CZgb
70
35 4
9
9
85
76
19
28
58
77
54 61
LT
31
79 13
BEA VER D
AM
87
39
Trcs
Qal
69 22
10
88
72
FA U
78
70
LT
CZdi - Beaverdam diorite: Grayish-white to greenish-white, coarse-grained, unfoliated to well-foliated, mesocratic (CI less than 40) biotite hornblende metagranodiorite to metadiorite.
77
74
76
80
U
Falls Lake Terrane
Trcs/si2
U FA
CZdi
73
CZfs
60
Jd
72
Trcc
24
84
82
50
Qal
45
72
59
Late Proterozoic - Cambrian
81 78
CZcf - felsic metagranite: Light gray, fine- to coarse-grained, locally porphyritic, weakly- to well-foliated, leucocratic (CI less than 20), white mica metagranite to metagranodiorite.
85 33
6
Jd
CZcf
D
1 53 17
40
1
33 32
19
80 20 24
25
28
32
27 31
CZfs
36 00' 00"
78 45' 00"
78 37' 30"
1
MN GN
8
1,000 500
1 22'
142 MILS
0
0
1,000
1
2,000
3,000
0.5
4,000
STRUCTURAL SYMBOLS Observation sites are centered on the strike bar or are at the intersection point of multiple symbols.
1:24,000 SCALE
0.5
1
5,000
6,000
0
1
strike and dip of inclined regional foliation
48
Miles
7,000 Feet
24 MILS
strike and dip of ductile fault surface
52
NORTH CAROLINA
Kilometers
strike and dip of inclined joint surface
66
MAP LOCATION
horizontal joint surface
2000 MAGNETIC NORTH DECLINATION AT CENTER OF SHEET
42
X
Jd
FALLS LAKE
FALLS LAKE
FALLS LAKE
FALLS LAKE
FALLS LAKE
CZfut CZfut
CAROLINA TERRANE
-4000' FALLS LAKE TERRANE
no vertical exaggeration measurement in feet below ground surface
N.C.
strike and dip of quartz vein
63
strike and dip of brittle fault surface
strike of vertical brittle fault surface
strike and dip of inclined dike
strike of vertical dike
bearing and plunge of mineral lineation
observation station location
44
bearing and plunge of slickenside
8
bearing and plunge of fold hinge
Base topographic map is digital raster graphic image of the Creedmoor 7.5-minute USGS quadrangle (1987),
CZfu
-4000' DURHAM TRIASSIC BASIN
strike of vertical joint surface
-2000'
CZfs
SV
CZdi
CZfu
I LL
CZpx
horizontal bedding
CZfu
CZfa
EF AU
CZcf
EAST
contact
58
CZfut
O
LE E
Trcc
40
0'
LT
FA U Jd
RO
Trcs/c
BO
Trcs
ES
-2000'
JO N
Trcs/si2
SR 1907
FALLS LAKE
NC 50
FALLS LAKE
0'
LT
WEST
FALLS LAKE
59
A'
strike of vertical regional foliation
strike and dip of inclined bedding
19
CONTOUR INTERVAL 10 FEET
A
O
Faults- Solid where location known, dashed where inferred, dotted where concealed. For ductile strike-slip faults, X indicates movement away from the observer, O indicates movement towards the observer. For normal brittle faults, D indicates downthrown side, U indicates upthrown side.
CZfua
21
X
U
10
20
LA KE
FAULTS
Geology mapped October 2001 - April, 2002 by the North Carolina Geological Survey. Supported by the U.S. Geological Survey, National Cooperative Geologic Mapping Program, under assistance Award No. 01HQAG0061. Field review by Richard M. Wooten, NCGS; Edward F. Stoddard, N.C. State University; and David E. Blake, UNC-Wilmington. Disclaimer: This Open-File report is preliminary and has been reviewed for conformity with the North Carolina Geological Survey editorial standards or with the North American Stratigraphic Code. Further revisions or corrections to this map may occur.
GEOLOGIC MAP OF THE CREEDMOOR 7.5-MINUTE QUADRANGLE, GRANVILLE, WAKE AND DURHAM COUNTIES, NORTH CAROLINA By Timothy W. Clark, Cindy M. Phillips and David E. Blake Digital representation by Cindy M. Phillips and Michael A. Medina 2016
Creedmoor 7.5-minute Quadrangle, NCGS Open File Report 2016-18
North Carolina Department of Environmental Quality Energy Group
Jenny Kelvington, Executive Director Kenneth B. Taylor, State Geologist
78 37' 30"
78 45' 00"
36 07' 30"
36 07' 30"
DESCRIPTION OF MAP UNITS
Trcs/si2 84
82
Qal
82 22
75
15
82
26
60
Qal: Quaternary alluvium: Unconsolidated, poorly-sorted and poorly stratified, tan to light gray deposits of gravel, sand, silt, and clay. Similar to stratified terraces along streams.
Qal
INTRUSIVE ROCKS
1
Jd
14
50
Qal
72
Trcs/si2
10
8
72
Jd
Jurassic
Jd
Quaternary
SURFICIAL UNIT
Jd
SEDIMENTARY ROCKS Trcc - conglomerate: reddish-brown to dark brown, irregularly bedded, poorly sorted, cobble to boulder conglomerate. Muscovite is rare to absent in the very coarse-grained to gravelly matrix. An arbitrary cut-off of greater than 50 percent conglomerate distinguishes this unit from the Trcs/c facies. Clasts are chiefly miscellaneous felsic and intermediate metavolcanic rocks, quartz, epidote, bluish- gray quartz crystal tuff, muscovite schist, and rare meta-granitic material. Maximum clast diameters are in excess of 2 m along Haleys Branch east of the RDU airport.
Trcc
Trcs/si2
85 85
5
Trcs/c - sandstone with interbedded conglomerate: reddish-brown to dark brown, irregularly bedded, poorly sorted, coarse-grained to pebbly, muddy lithic sandstones with interbedded pebble to cobble conglomerate. Muscovite is rare to absent in the matrix. Well-defined conglomerate beds distinguish this unit from conglomerate basal lags of Trcs. An arbitrary cut-off of less than 50 percent conglomerate distinguishes this unit from the Trcc conglomerate facies. Conglomerate beds are channel-shaped and scour into the underlying sandstone beds. Unit grades eastward into Trcc.
Trcs/c
Triassic
Qal
Qal
Trcs/si2
Trcs - interbedded sandstone and pebbly sandstone: reddish-brown to dark brown, irregularly bedded to massive, poorly to moderately sorted, medium- to coarse-grained, muddy lithic arkoses, with occasional, matrix-supported granules and pebbles or as 1-5 cm thick basal layers. Muscovite is common to absent. Occasional bioturbation is usually surrounded by greenish-blue to gray reduction halos. Beds are tabular, 1-3 meters thick, with good lateral continuity. Unit grades eastward into Trcs/c.
Trcs
Trcs/si2 - sandstone with interbedded siltstone: Cyclical depositional sequences of whitish-yellow to grayish-pink to pale red, coarse- to very coarse-grained, trough cross-bedded lithic arkose that fines upward through yellow to reddish-brown, mediumto fine-grained sandstone, to reddish-brown, burrowed and rooted siltstone. Bioturbation is usually surrounded by greenish-blue to gray reduction halos. Coarse-grained portions contain abundant muscovite, and basal gravel lags consist of clasts of quartz, bluish-gray quartz crystal tuff, and mudstone rip-ups.
Trcs/si2
Qal Jd
14
67
Jd - diabase dikes and sills: Steeply dipping to vertical dikes and horizontal to shallowdipping sills of gray to bluish-black, fine- to coarse-grained, locally porphyritic plagioclase diabase, that may be olivine-bearing. Solid lines where observed, dashed where inferred, and dotted where concealed. Red circles indicate areas of abundant float inferred to be near original location.
Trcs/si2
69
25
37
METAMORPHIC ROCKS Trcs/c 71 67
Qal
12
Qal
Qal
Jd
65
Trcs/si2
Jd
Qal
86 70 76
Trcs/si2
Carolina Terrane
56
78
30
Jd
Trcs/c
Jd
LAK E
D
Jd
65
Jd
Jd
6
78
78
87 10 72
10
5
38
45
37
66
77 75
D
80
FALLS LAKE
Jd
13 65 4
15
7
30
20
JO
71
Trcs/c
12
Jd
44
19 6
80
18 78
19 86
80
33
19
74
85
22
72
19
9
7
19
4
72
83
12
42
72 8 3
79
85
6
5
54
Trcs/c
86
85
45 55
54
61
42
67
89
9
9
12
46
57
57
U
U
61
52 60
D 82 55
67
33
47
26 70 72
56
47 75
63
65
82
74
42
52
41
50
57
28
47
U
CZfu
51
CZfkq
41
33 34 48
U
63
36 40
65 63
50
CZfs
CZfua
37
51
52 44
53
47
62
40
48
CZfs
52
35
58 31
30
28
49
8 27
36
53
55
34
21
38
CZfut
39 45
70
33
60 34
Jd CZfut Jd 26
33
14
25
23
28
CZpx - Beaverdam metapyroxenite: Greenish-black, medium- to coarse-grained, massive, hypermelanocratic (CI greater than 90) metapyroxenite with minor amounts of talc, magnetite and chlorite.
CZfs
CZfs - Falls Lake schist: Silvery-gray to black, fine- to medium-grained, well-foliated, white mica ± biotite ± garnet ± chlorite schist to gneiss.
CZfu
CZfu - ultramafic rocks (undivided): Variably altered ultramafic rocks including metapyroxenite, actinolite-chlorite schist, and talc schist.
CZfut
CZfut - talc schist: White to gray talc-tremolite schist, talc-chlorite schist, and soapstone. Rhombohedral cavities suggest former presence of a carbonate mineral (ankerite?).
22
20
28
15 19
CZfua - actinolite rock and actinolite-chlorite schist: Dark green, schistose to almost massive, splintery rock composed of actinolite and varied amounts of chlorite; minor amounts of talc and magnetite octrahedra are common.
CZfua
CZfa - amphibolite: Dark gray to black, fine- to coarse-grained, well-foliated dikes generally parallel to foliation within country rock. CZfus - serpentinite: Pale greenish-gray, fine-grained, and massive to moderately-foliated; contains fibrous tremolite, clots of magnetite, and minor amounts of talc and dark green, unfoliated, chlorite actinolite rock. CZfkq - kyanite quartzite: Silver-white, fine- to medium-grained, foliated, white mica + kyanite quartzite + opaque minerals.
39
23
CZfut
23
CONTACTS
20
CZfu
22 7
15 15
9
CZfu 26
50
29
12 13
Lithologic contacts - Solid where location known, dashed where inferred, dotted where concealed.
14 15 2
CZfut
22
FA LL S
CZpx
CZfkq
A'
35
21
CZgb - Beaverdam gabbro and metaproxenite: Black and white to greenish black, fine- to medium-grained, unfoliated to well-foliated, melanocratic to hypermelanocratic (CI greater than 40) gabbro to metapyroxenite.
CZfus
35
25
CZfa 27 27
27
23 53
CZfus 20
43
21
17
23
62
32
28
81
60
55
CZgb
32
52
31
42 18
CZfa
32
16
CZfua
CZfa
31
67
19
21
CZfa
44
49
72
40 41
40
32
36
42
28
37
66
38
62
41
59 32
57 36
CZfu
20
46
51
CZfu
CZfu
32
44
38
48
36
48
42
21
47
20
53
50
42
54
52 50
60
44
55
49
39
40
48
U
CZfa
41
42
CZqdi - Beaverdam blue quartz diorite: Buff to green and white, coarse-grained, unfoliated, mesocratic (CI less than 40) biotite + hornblende metagranodiorite to metadiorite, containing conspicuous crystals of blue quartz.
CZfa
CZfu
58
62
45
D
47
35
36
59
42
57
72
71
45
54
51
67
CZfu
42
67
35
47
70
72 58
61
75
67
42
47 36
CZcf
Trcc
60 87
36
CZdi
42
68
68
70
69
Jd
36 00' 00"
52
52 62 70
52
65
CZqdi
75
CZfua
67
70
68
67 51 48
81
O
CZpx
40
62
69
27
55
52
73
U
68
CZdi
56 59
D
CZpx
47 58
47
50
16
54
57
D
D
74 67
36
42
Trcc
15
22
66
54
Trcs/si2
Trcs
42
70
Jd
8
Jd 42
Trcc
65
27
81
N
R
Jd
44
56
47
Trcc
70
36
LE ES VI LL E
70 67
85 81
65
BO ES
46
62
88
76
68
77
Jd
Jd
54 61 80
CZqdi
87 45 75
35
84
D
79
30 75
A
55
Trcc
14
82
35
66 75
60
21 13
53
U
26 48
41
12
Trcs
58
32
73
82
42
29
88
60
19
52
65
CZgb
70
35 4
9
9
85
76
19
28
58
77
54 61
LT
31
79 13
BEA VER D
AM
87
39
Trcs
Qal
69 22
10
88
72
FA U
78
70
LT
CZdi - Beaverdam diorite: Grayish-white to greenish-white, coarse-grained, unfoliated to well-foliated, mesocratic (CI less than 40) biotite hornblende metagranodiorite to metadiorite.
77
74
76
80
U
Falls Lake Terrane
Trcs/si2
U FA
CZdi
73
CZfs
60
Jd
72
Trcc
24
84
82
50
Qal
45
72
59
Late Proterozoic - Cambrian
81 78
CZcf - felsic metagranite: Light gray, fine- to coarse-grained, locally porphyritic, weakly- to well-foliated, leucocratic (CI less than 20), white mica metagranite to metagranodiorite.
85 33
6
Jd
CZcf
D
1 53 17
40
1
33 32
19
80 20 24
25
28
32
27 31
CZfs
36 00' 00"
78 45' 00"
78 37' 30"
1
MN GN
8
1,000 500
1 22'
142 MILS
0
0
1,000
1
2,000
3,000
0.5
4,000
STRUCTURAL SYMBOLS Observation sites are centered on the strike bar or are at the intersection point of multiple symbols.
1:24,000 SCALE
0.5
1
5,000
6,000
0
1
strike and dip of inclined regional foliation
48
Miles
7,000 Feet
24 MILS
strike and dip of ductile fault surface
52
NORTH CAROLINA
Kilometers
strike and dip of inclined joint surface
66
MAP LOCATION
horizontal joint surface
2000 MAGNETIC NORTH DECLINATION AT CENTER OF SHEET
42
X
Jd
FALLS LAKE
FALLS LAKE
FALLS LAKE
FALLS LAKE
FALLS LAKE
CZfut CZfut
CAROLINA TERRANE
-4000' FALLS LAKE TERRANE
no vertical exaggeration measurement in feet below ground surface
N.C.
strike and dip of quartz vein
63
strike and dip of brittle fault surface
strike of vertical brittle fault surface
strike and dip of inclined dike
strike of vertical dike
bearing and plunge of mineral lineation
observation station location
44
bearing and plunge of slickenside
8
bearing and plunge of fold hinge
Base topographic map is digital raster graphic image of the Creedmoor 7.5-minute USGS quadrangle (1987),
CZfu
-4000' DURHAM TRIASSIC BASIN
strike of vertical joint surface
-2000'
CZfs
SV
CZdi
CZfu
I LL
CZpx
horizontal bedding
CZfu
CZfa
EF AU
CZcf
EAST
contact
58
CZfut
O
LE E
Trcc
40
0'
LT
FA U Jd
RO
Trcs/c
BO
Trcs
ES
-2000'
JO N
Trcs/si2
SR 1907
FALLS LAKE
NC 50
FALLS LAKE
0'
LT
WEST
FALLS LAKE
59
A'
strike of vertical regional foliation
strike and dip of inclined bedding
19
CONTOUR INTERVAL 10 FEET
A
O
Faults- Solid where location known, dashed where inferred, dotted where concealed. For ductile strike-slip faults, X indicates movement away from the observer, O indicates movement towards the observer. For normal brittle faults, D indicates downthrown side, U indicates upthrown side.
CZfua
21
X
U
10
20
LA KE
FAULTS
Geology mapped October 2001 - April, 2002 by the North Carolina Geological Survey. Supported by the U.S. Geological Survey, National Cooperative Geologic Mapping Program, under assistance Award No. 01HQAG0061. Field review by Richard M. Wooten, NCGS; Edward F. Stoddard, N.C. State University; and David E. Blake, UNC-Wilmington. Disclaimer: This Open-File report is preliminary and has been reviewed for conformity with the North Carolina Geological Survey editorial standards or with the North American Stratigraphic Code. Further revisions or corrections to this map may occur.
GEOLOGIC MAP OF THE CREEDMOOR 7.5-MINUTE QUADRANGLE, GRANVILLE, WAKE AND DURHAM COUNTIES, NORTH CAROLINA By Timothy W. Clark, Cindy M. Phillips and David E. Blake Digital representation by Cindy M. Phillips and Michael A. Medina 2016
Creedmoor 7.5-minute Quadrangle, NCGS Open File Report 2016-18
North Carolina Department of Environmental Quality Energy Group
