GEOLOGICAL SURVEY OF ALABAMA QUADRANGLE SERIES 63 PLATE

(PRINCETON)

o 5 o 86 07'30" 581000m E 82 583 5 5 (MUD CREEK) 5 5 5 440,000 FEET 5 5 5 86 00' (WANNVILLE) A 5' 84 85 86 87 R 5 E R 6 E 2'30" 88 89 90 91 34o45' eD D e 34o45' CORRELATION OF MAP UNITS D Mm Mb Mb D Mb D Qal Qal Quaternary Mm CENOZOIC D unconformity 3845000m N D e !pv D 3845 Pennsylvanian D D D Mp !pv D Mb Mb Mh Qal Mississippian D Qal D Mp Mp Mm Qal Qal 3844 D Mtfpm D Qal 38 Mb 44 unconformity

Dc Devonian PALEOZOIC Mp Qal 1,540,000 MhD D Qal FEET D e unconformity Mb Mb T 3 S Srm D T 3 S Silurian T 4 S D T 4 S D unconformity D D Mm 3843 D Osli Qal D e D 38 D !pv 43 Mp Qal !pv Onvsr Ordovician unconformity

O\k Cambrian D D Qal

3842 Qal e 38 42 MhD MhD DESCRIPTION OF MAP UNITS D Qal Alluvium (Quaternary)—Unconsolidated sand, silt, clay, and chert gravel derived from local bedrock. Mb D D Mb !pv Pottsville Formation (Pennsylvanian)—Light-gray, medium- to coarse-grained, quartzose D D sandstone locally containing scattered to abundant, well-rounded, white quartz pebbles; quartz D D !pv pebble and ferruginous claystone conglomerate is locally present at the base. Interbeds and 38 D 41 Qal 3841 intervals of dark-gray shale and mudstone and wavy-bedded sandstone are locally common. 42'30" D 42'30" Thin interbeds of coal occur locally. !pv D Mp Pennington Formation (Mississippian)—Lower part includes at the base distinctive medium- to D Mp D D D D dark-gray dolomudstone that commonly weathers yellowish-gray, contains laminae, nodules, and stringers of dark-gray and white chert, and is overlain by partly cherty, dark- and D greenish-gray shale; middle part includes light-brownish-gray bioclastic limestone interbedded e D D D with maroon, green, and pale-reddish-brown shale; upper part includes very light gray, very fine !pv D grained, wavy-bedded sublithic sandstone and interbedded dark-gray shale and mudstone; thin D D beds of coal are locally present at the top of formation. D 3840 Mp D MhD Mb Mb Mb Bangor Limestone (Mississippian)—Predominantly light- to dark-brownish-gray, bioclastic and D 3840 oolitic (predominantly superficial ooids) limestone; also contains medium-gray peloidal Qal Mh Mb limestone, medium-gray fenestral mudstone, light- to medium-gray dolomudstone, and Qal D D D D D e medium-gray, olive-green, and grayish-red shale; limestone in the upper part contains irregular D Mb e nodules and stringers of dark-gray chert. Mh D Qal D Mh Mh Hartselle Sandstone (Mississippian)—Locally present between the Bangor and Monteagle MhD D Limestones and includes gray to brownish-gray, very fine grained, partly calcareous sandstone; e in southwest part of quadrangle, the Hartselle interval includes interbedded sandstone and D limestone. 38 39 Qal Mb D Mm Monteagle Limestone (Mississippian)—Light- to locally medium-gray, oolitic and bioclastic 3839 Mb e limestone; few beds of dolomudstone, in part containing vugs filled with white calcite or MhD !pv e D D celestite; an interval of interbedded greenish-gray to medium-gray shale and limestone is D Mh Mp e present near the middle of the unit. eD Mh D

e MhD D !pv

Mtfpm Tuscumbia Limestone, Fort Payne Chert, and Maury Formation undifferentiated Mb ( (LIM ROCK) Qal Mm D (Mississippian)—Tuscumbia Limestone: Light-gray predominantly bioclastic and micritic

e (HOLLYWOOD)

Mb D ( limestone containing light-gray chert nodules. Fort Payne Chert: Dark- to light-gray, micritic D D Mp eD limestone containing blue-gray to dark-gray chert in irregular beds and nodules in fresh

Mh D ( exposures; most outcrops consist of irregularly bedded, grayish-orange, partly fossiliferous 3838 D

63 chert; characterized by molds of large crinoid stems. Maury Formation: Greenish-gray shale e ( D D 3838 Mb o and mudstone containing phosphate nodules. Mp

Mb Dc

( ( ( Chattanooga Shale (Devonian)—Dark-gray to black, carbonaceous shale with a thin bed of light- to D ( 52 dark-gray sandstone at the base. Mb ( D

D Mh 40 D DD ( oo Srm Red Mountain Formation (Silurian)—Olive-gray shale (weathers yellowish-brown) containing

Mh D ( D ( interbeds of medium-gray and dark-reddish-gray, fossiliferous and locally ferruginous limestone

D ( in lower part; interbeds of siltstone, silty shale, and some very light gray to reddish-brown fine- e ( eD to medium-grained sandstone in upper part.

D (

D Mp Mtfpm ( 3837 e D D

e D e Osli Sequatchie Formation, Leipers Limestone, and Inman Formation undifferentiated

Mb D ( D !pv ( D D D 3837 o o (Ordovician)—Sequatchie Formation: Olive-gray and grayish-red shale and mudstone

D 20 ( 35 ( ( o interbedded with fossiliferous and partly arenaceous limestone; the lower part includes a Mh D D o D 69 Mb ( 45 o massive bed of reddish-gray to yellowish-gray, sandy limestone to calcareous, poorly sorted

( ( fine- to very coarse grained sandstone; dark-orange-brown, poorly sorted, ferruginous sandstone DD ( D 41 D ( ( o is locally present near the top of the formation. Leipers Limestone: Dark-gray to olive-green, D (42 partly argillaceous limestone containing argillaceous partings that result in nodular bedding, and

40' ( o 40' dark-gray fossiliferous limestone. Inman Formation: Interbedded and interlaminated ( Qal

grayish-red and olive-green silty limestone, and laminated maroon and yellowish-brown ( ( D

( D calcareous siltstone and shale. 3836 ( A' 30

DOsli 38 Onvsr Nashville and Stones River Groups undifferentiated (Ordovician)—Nashville Group: Light- to D ( o 36 D D Dc dark-gray, fossiliferous limestone that is silty, argillaceous, and dolomitic in part and locally

( ( Srm contains interbeds and partings of greenish-gray mudstone and shale. Stones River Group: Medium- to dark-gray, partly argillaceous and silty limestone with a few abundantly

e ( Onvsr fossiliferous intervals; greenish-gray, calcareous shale interbeds and partings locally common; ( ( light-green bentonitic shale and bentonite present in the upper part. At the base is light- to

D D ( medium-gray and olive-gray dolomite, dolomitic limestone, and limestone locally containing

D chert pebble conglomerate (Pond Spring). Qal (

Mtfpm 30 48 ( ( oD O\k 3835 Mm 34o o Knox Group undifferentiated (Cambrian and Ordovician)—Light- to medium-dark-gray, fine- to

D coarse crystalline siliceous dolomite and minor limestone; weathers to cherty residuum in which D ( 3835 the chert commonly preserves the primary texture of the original carbonate rocks. The Mm

( ( lowermost chert is sandy (rounded medium to coarse quartz) and contains scattered quartz D sandstone lenses. The chert is commonly opaque, white, well fractured, and partly dolomoldic.

Mb Qal ( 20 1,510,000 D

28 o Qal FEET D ( o Sequatchie anticline

DD Qal D SYMBOLS FOR GEOLOGIC MAP D ( v D !pv D D Contact, dashed where located very approximately, showing location of control point (contact

Mm D D ( exposed or closely located) e Mh ( 3834 F Qal

D e Mp ( 3834 Contact, concealed beneath mapped units D D ( D D O\k ( (

e ( Qal Thrust fault, located very approximately, sawteeth on upper plate

D ( 88 D

T 4 S D D D o ( ( ( T 5 S ( 54 T 4 S Thrust fault, concealed beneath mapped units DD 39 o D T 5 S

( ( Do F Trace of anticline axis, located approximately

56 D ( ( o D Onvsr Water boundary Mm

D D 15 D ( D o Strike and dip of bedding

38

33 (

v Strike of vertical bedding

Srm 38

v v D 33 ( ( 89 !pvD e e o e Strike and dip of horizontal bedding

Mh D D ( 53 Osli Mh

D oD D Outcrop of Hartselle Sandstone, too thin to display v ( v 30 Onvsr D

Mh Dc ( ( o D

D SYMBOLS FOR CROSS SECTION A-A' D ( 35 Qal

!pv e o Stratigraphic contact

58 O\k ( ( Mm oD D Onvsr

3832 Mb Qal D Srm Fault, showing relative movement ( ( 75 D D 3832000m N Mtfpm Do Osli DD

( ( Dc Mm Qal Mtfpm 34o37'30" D 34o37'30" 5 86o07'30" 581 582 420,000 FEET 583 84 5' 585 (LANGSTON) 586 587 2'30" 588 589 590 591000m E 86o00' (DUTTON) R 5 E R 6 E Base topographic map U.S. Geological Survey 1947 MN (Photorevised 1982) GN (SWEARENGIN) ILL. Digital database by Philip Dinterman KENTUCKY SCALE 1: 24,000 MO VA Produced in cooperation with the U.S. Geological 0o32’ o 1 1/ 2 0 1 MILE 0.5 9 MILS TENNESSEE N.C. Survey, National Cooperative Geologic Mapping Program 9 MILS 1 1/ 2 0 1 KILOMETER MISS S.C. Polyconic projection. 1927 North American datum ALA GA 10,000-foot grid based on Alabama (East) UTM Grid and 1982 Magnetic North CONTOUR INTERVAL 20 FEET QUADRANGLE LOCATION rectangular coordinate system Declination at Center of Sheet NATIONAL GEODETIC VERTICAL DATUM OF 1929

Map rotated 0.6 degrees clockwise for display

CROSS SECTION A-A' Sequatchie fault Sequatchie anticline

A McBroom Cove Tater Knob Scottsboro A' !pv !pv !pv (Feet) 1,500 1,500 Feet Mp Mp 1,000 Mtfpm 1,000 Mb Mb Dc Mm Mm 500 Mtfpm 500 Dc Srm Mtfpm Mtfpm Osli Srm Dc Srm Dc Srm (Sea Level) 0 Osli Onvsr Osli Osli 0 (Sea Level) -500 -500 Onvsr Onvsr O\k Onvsr -1,000 -1,000

-1,500 O\k -1,500 O\k O\k O\k -2,000 -2,000

Scale 1:24,000 No vertical exaggeration

GEOLOGIC MAP OF THE SCOTTSBORO 7.5-MINUTE QUADRANGLE, JACKSON COUNTY, ALABAMA

by Dorothy E. Raymond 2013 Berry H. (Nick) Tew, Jr. State Geologist