KGS--Franklin County Geology--Stratigraphic Sections 2

Prev Page--Economic Geology || Next Page--References

Stratigraphic Sections

Each stratigraphic unit shown on Plate 2 is represented here by at least one measured section description. All descriptions pertain to Franklin County exposures with the exception of A9 and A10, which were measured and described in Anderson County.

A sections || B sections || C sections || D sections

B1--Section in an abandoned quarry at cen. E line sec. 23, T. 18 S., R. 19 E.			Thickness (feet)
Stanton Limestone
	South Bend Limestone Member
		Limestone, blue gray to brown on fresh surfaces, weathers brown, thin to thick and relatively even bedded, microcrystalline, brittle; Chonetes, Composita, Derbyia, Dielasma, Meekella, Punctospirifer, marginiferids, fusulinids, crinoids, fenestrate bryozoans, trilobite pygidia	5.1
	Rock Lake Shale Member
		Shale, gray green, paper-thin beds weather into irregular blocks, clayey to slightly silty	0.7
		Limestone, gray on fresh surfaces, weathers buff, slightly irregularly bedded, clayey; Aviculopinna, Linoproductus, Neospirifer, crinoids, trilobite pygidia	2.7
		Limestone, gray to white on both fresh and weathered surfaces, a single bed, grades downward into a breccia of limestone and shell fragments in a microcrystalline matrix; Aviculopinna, Composita, Neospirifer, crinoids	2.0
	Total thickness of Rock Lake Shale		5.4
	Stoner Limestone Member
		Limestone, gray to white on fresh surfaces, weathers gray to tan, thin irregularly bedded, microcrystalline; Composita, Enteletes, Linoproductus, Neospirifer, dictyoclostids, crinoids, trilobite pygidia	11.0
	Eudora Shale Member
		Shale, black, platy to fissile; conodonts; basal contact concealed; thickness exposed	0.5

B2--Section of a streambank and road cut exposure near the cen. S line sec. 7, T. 18 S., R. 20 E.			Thickness (feet)
Stanton Limestone
	Stoner Limestone Member
		Limestone, gray to white on both fresh and weathered surfaces, thin and wavy bedded, microcrystalline matrix contains abundant crystalline calcite; Enteletes productids, crinoids, slender fusulinids; incomplete thickness	6.5
	Eudora Shale Member
		Shale, tan to green downward, paper-thin strata weather to flakes, clayey to silty	2.0
		Shale, black, platy to fissile; conodonts	1.5
	Total thickness of Eudora Shale		3.5
	Captain Creek Limestone Member
		Limestone, yellow to brown on fresh surfaces, weathers tan, even bedded, microcrystalline, abundant crystalline calcite; Enteletes, productids, fenestrate bryozoans, sparse fusulinids	8.5
Vilas Shale
		Shale, gray green, clayey to silty; mostly covered; about	20.00
Plattsburg Limestone
	Spring Hill Limestone Member
		Limestone, gray on fresh surfaces, weathers tan, thin and wavy bedded, fine grained, compact; Composita shell pavement about 3 feet below top, productids, crinoids, echinoids, bryozoans, slender fusulinids concentrated along bedding surfaces in lower part; basal contact covered; thickness exposed	11.0

B3--Section of an abandoned quarry in the NE 1/4 SE 1/4 sec. 6, T. 18 S., R. 20 E.			Thickness (feet)
Stanton Limestone
	Stoner Limestone Member
		Limestone, gray to white on both fresh and weathered surfaces, thin and irregularly bedded, microcrystalline matrix contains abundant crystalline calcite; brachiopods, crinoids, echinoids; incomplete thickness	5.0
	Eudora Shale Member
		Shale, tan, paper-thin strata weather into flakes	4.0
		Shale, black, platy to fissile; conodonts	1.5
	Total thickness of Eudora Shale		5.5
	Captain Creek Limestone Member
		Limestone, white on fresh surfaces, weathers gray, thin to thick and even bedded, abundant coarsely crystalline calcite in a microcrystalline matrix; fusulinids, brachiopods, crinoids, corals, bryozoans	11.0
Vilas Shale
		Shale, gray brown to yellow, clayey, calcareous in upper 2 feet	6.5
		Limestone, yellow, earthy, surface weathers to a "boxwork"	1.0
		Shale, gray to brown, weathers into flakes and irregular blocks	4.0
		Limestone, gray blue on fresh surfaces, weathers tan, thin and even bedded; poorly preserved plant fossils	1.5
		Shale, gray to blue, weathers into flakes and irregular plates, clayey	6.0
	Total thickness of Vilas Shale		19.0
Plattsburg Limestone
	Spring Hill Limestone Member
		Limestone, gray blue to black on fresh surfaces, weathers gray to brown, a single bed; brachiopods	0.6
		Shale, gray blue, clayey, calcareous	0.7
		Limestone, gray to white on fresh surfaces, weathers blue gray, thin to thick and irregularly bedded, fine grained, compact; ferruginous weathering rind caps unit; Aviculopinna, Allorisma, Ameura, Composita, Enteletes, Ditomopyge, Fistulipora, Juresania, Linoproductus, Mooroceras, Myalina, Septopora, dictyoclostids, echinoconchids, crinoids	15.0
	Total thickness of Spring Hill Limestone		16.3
	Hickory Creek Shale Member
		Shale, gray, calcareous	0.5
	Merriam Limestone Member
		Limestone, gray on fresh surfaces, weathers gray blue, thin and wavy bedded, extremely compact and brittle, fractures conchoidally; brachiopods, abundant crinoid remains, sparse fusulinids; basal contact covered; thickness exposed	3.0

B4--Composite section of road cut exposures in the NE 1/4 sec. 29, T. 17 S., R. 20 E. (Spring Hill Limestone to Captain Creek Limestone), and in the SE 1/4 sec. 29, T. 17 S., R. 20 E. (Merriam Limestone to Spring Hill Limestone).			Thickness (feet)
Stanton Limestone
	Captain Creek Limestone Member
		Limestone, gray to yellow brown on fresh surfaces, weathers buff, even bedded, microcrystalline; Enteletes, Lophophyllidium, fusulinids, crinoids; incomplete thickness	2.0
Vilas Shale
		Shale; covered interval; about	13.0
Plattsburg Limestone
	Spring Hill Limestone Member
		Limestone, gray to white on both fresh and weathered surfaces, thin and wavy bedded, microcrystalline matrix contains abundant coarsely crystalline calcite, nodular chert in upper 3.5 feet; Composita, Juresania, Lophophyllidium, echinoid spines, fenestrate bryozoans, crinoids; about	11.0
	Hickory Creek Shale Member
		Shale, yellow, calcareous, contains yellow limestone stringers	2.5
	Merriam Limestone Member
		Limestone, gray on fresh surfaces, weathers gray brown, even bedded, microcrystalline; prominent Composita-myalinid zone in lower bed, marginiferids, crinoids; both contacts within impure limestone gradational zones	3.0
	Total thickness of Plattsburg Limestone		16.5
Bonner Springs Shale

B5--Section of a road cut exposure in the SW 1/4 sec. 24, T. 17 S., R. 20 E.			Thickness (feet)
Stanton Limestone
	Captain Creek Limestone Member
		Limestone, gray to blue on fresh surfaces, weathers tan, even to slightly wavy and thin bedded, microcrystalline matrix contains abundant coarsely crystalline calcite; fusulinids, brachiopods, crinoids, corals; incomplete thickness	2.0
Vilas Shale
		Shale, gray green, paper-thin strata weather to flakes, silty to clayey upward, calcareous; about	15.0
		Siltstone, yellow brown	1.0
		Shale, gray green to brown, clayey	7.0
	Total thickness of Vilas Shale		23.0
Plattsburg Limestone
	Spring Hill Limestone Member
		Limestone, gray to white on both fresh and weathered surfaces, thin arid wavy bedded, microcrystalline; Osagia, sparse ooliths, and a shale pavement of robust Composita about 1 foot below top; crinoids, productids, bryozoans, slender fusulinids	8.0
	Hickory Creek Shale Member
		Shale, yellow green, impure limestone and calcareous shale	2.0
	Merriam Limestone Member
		Limestone, gray blue on fresh surfaces, weathers tan, even bedded, microcrystalline; Composita-myalinid zone in lower bed; Contacts within impure limestone gradational zones	3.4
	Total thickness of Plattsburg Limestone		13.4
Bonner Springs Shale
		Shale, gray green, silty; basal contact covered; thickness exposed	1.0

B6--Section in an abandoned quarry in the SW 1/4 sec. 6, T. 17 S., R. 20 E.			Thickness (feet)
Stanton Limestone
	Stoner Limestone Member
		Limestone, white on fresh surfaces, gray to white in the lower part and brown in the upper part on weathered surfaces, thin and wavy bedded, microcrystalline; Enteletes, dictyoclostids, fusulinids, crinoids, fenestrate bryozoans; thickness exposed	18.0
	Eudora Shale Member
		Shale, green to brown, paper-thin strata weather to flakes	3.4
		Shale, black, platy to fissile; phosphatic nodules containing pyrite nuclei; conodonts, Orbiculoidea, Lingula, Conularia, sparse pyritized Composita, gastropods, and pectenoid clams	5.0
	Total thickness of Eudora Shale		8.4
	Captain Creek Limestone Member
		Limestone, blue gray on fresh surfaces, weathers yellow brown, thin to thick and moderately even bedded, microcrystalline; brachiopods, bryozoans, echinoid spines, Triticites	9.0
Vilas Shale
		Shale, gray to brown, weathers to flakes	1.0
Plattsburg Limestone
	Spring Hill Limestone Member
		Limestone, blue gray on fresh surfaces, weathers gray brown, thin and irregularly bedded, microcrystalline matrix contains abundant crystalline calcite; Composita shell pavement 2.7 feet below top overlies a foraminiferal Osagia-bearing bed which contains sparse ooliths; productids, crinoids, Enteletes, fenestrate bryozoans; basal contact concealed; exposed thickness	9.0

B7--Section in an abandoned quarry in the SE 1/4 sec. 27, T. 16 S., R. 20 E.			Thickness (feet)
Stanton Limestone
	Stoner Limestone Member
		Limestone, gray to white on both fresh and weathered surfaces, thin and wavy bedded, microcrystalline; brachiopods, crinoids, bryozoans, sparse fusulinids; incomplete thickness	5.0
	Eudora Shale Member
		Shale, tan, fissile	4.5
		Shale, black, platy, clayey	4.3
		Shale, olive green, platy, clayey	1.5
	Total thickness of Eudora Shale		10.3
	Captain Creek Limestone Member
		Limestone, gray to blue on fresh surfaces, weathers tan, uppermost 3 feet slightly irregularly bedded, lower 4.2 feet extremely even bedded, microcrystalline, largely algal; Ottonosia, Enteletes, crinoids, echinoid spines	7.2
Vilas Shale
		Shale, lower pant blue, upper part green to brown, weathers to flakes, clayey	3.0
Plattsburg Limestone
	Spring Hill Limestone Member
		Limestone, gray to white on fresh surfaces, weathers gray brown, thin to thick and wavy bedded, microcrystalline; clam and bryozoan concentration in uppermost 1 foot, Composita shell pavement about 3 feet below top of member; Aviculopinna, Derbyia, dictyoclostids, crinoids, fenestrate bryozoans; basal contact concealed; thickness exposed	10.5

B8--Section in an abandoned quarry at the NW cor. sec. 22, T. 16 S., R. 20 E.			Thickness (feet)
Stanton Limestone
	South Bend Limestone Member
		Limestone, blue to brown on fresh surfaces, weathers tan, thin to thick and even bedded, microcrystalline, brittle, fractures conchoidally; Dielasma, Derbyia, Meekella, Neospirifer, Chonetes crust caps lower bed of member; marginiferids, crinoids, echinoid spines, ramose and fenestrate bryozoans	3.2
	Rock Lake Shale Member
		Shale, green to tan, weathers into irregular blocks, clayey	0.3
		Coal, discontinuous smut	0.1
		Shale, gray green, weathers into irregular blocks, clayey	1.0
		Limestone, gray on fresh surfaces, weathers tan, nodular, impure	1.0
		Limestone, gray blue on both fresh and weathered surfaces, single bed, "mortar" breccia; Baylea, Bellerophon; basal contact disconformable; thickness irregular, maximum	1.8
	Total thickness of Rock Lake Shale		4.2
	Stoner Limestone Member
		Limestone, gray on both fresh and weathered surfaces, thin to thick and slightly irregularly bedded, microcrystalline; Composita, Derbyia, Punctospirifer, crinoids, fenestrate bryozoans, planispiral gastropods, echinoid spines, sparse fusulinids; upper contact hummocky, basal contact mostly covered	19.0
	Eudora Shale Member
		Shale, tan, weathers into flakes	1.2
		Shale, black, fissile; basal contact concealed; thickness exposed in streambank east of quarry	2.0

A sections || B sections || C sections || D sections

Prev Page--Economic Geology || Next Page--References

Kansas Geological Survey, Geology of Franklin County
Web version July 2002. Original publication date Jun. 1963.
Comments to webadmin@kgs.ku.edu
The URL for this page is http://www.kgs.ku.edu/General/Geology/Franklin/06_sect2.html