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Authors: |
Smith, James G.
,
MacKevett, E. M., Jr.
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Editors: |
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Date: |
/1970 |
Title: |
The Skolai Group in the McCarthy B-4, C-4, and C-5 Quadrangles, Wrangell Mountains, Alaska |
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1274-Q , , 27 , pl. 1 |
Host: |
U.S. Geological Survey Bulletin : |
Document Type: |
Article\Abst.\Chapter\report |
Annotation: |
p. Q22: AGE AND CORRELATION The fossil collections are from both the richly fossiliferous Golden Horn Limestone Lentil and from other strata in the formation. The collections were studied by R.E. Grant in consultation with E.L. Yochelson and J.T. Dutro, Jr. (written commun., 1966). According to Grant, "the fauna is not differentiated by rock type, at least as concerns genera that might be useful for correlation. Only a few genera of brachiopods are present, and they are the ones normally found in the Arctic Permian. Correlation must depend more on the absence of certain elements than on presence of common Arctic genera. The brachiopod fauna contains Permian elements, but none that definitely indicates a Late Permian age. Therefore, Early Permian is suggested by default. Yochelson examined snails in samples 62Apr-11D (USGS 22379-PC, which he identified as species of Straparollus (Euomphalus). They are not sufficiently well preserved for specific identification, but they seem to resemble S. (E.) cornudanus (Shumard) of Wolfcampian age more closely than S. (E.) of late Leonard and Word age. This tentative opinion suppots the essentially negative evidence of the brachiopods that the collections are Early Permian." Grant's faunal list of the collections follow. All collections are from the McCarthy C-4 quadrangle, and their localitions are keyed alphabetically to plate 1. A few collections that appear to contain similar fauna were made in the B-4 quadrangle. p. Q25: On the basis of the paleontologic evidence, the Hasen Creek Formation and the Golden Horn Limestone Lentil are considered to be Early Permian. |
UserNote |
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62AMk-218
(22371-PC)
, Mc Carthy
, Golden Horn Limestone Lentil; 3.2 miles S. 1 deg. W. of triangulation Coal. Lat. 61 deg. 39'00", long 142 deg. 15'18".
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crinoid columnals, indet.
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62AMk-231A
(22372-PC)
, Mc Carthy
, Golden Horn Limestone Lentil, south of Skolai Creek; 0.55 mile N. 21 deg. W. of triangulation Fulcrum. Lat. 61 deg. 40'06", long 142 deg. 21'51". (according to Smith and MacKevett, 1970); [Rowett, 1975, p. 71 provides following description: Hasen Creek Formation, Golden Horn Limestone Lentil; south of Skolai Creek, 0.55 mile N. 21 deg. W. of triangulation stration FULCRUM; lat. 61 deg. 40'06" N., long. 142 deg. 24'55" W. Collectors: E.M. MacKevett, Jr., H.C. Berg, and George Plafker, 1962.]
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crinoid columnals, indet.
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abundant bryozoans, undet.
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62AMk-252
(22373-PC)
, Mc Carthy
, Hasen Creek Formation, limestones interbedded with shales, east of the Nizina Glacier and south of Skolai Creek; 0.50 mile S. 42 deg. W. of triangulation Fulcrum. Lat. 61 deg. 38'26", long. 142 deg. 23'36".
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crinoid columnals, indet.
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productoid fragment?, indet.
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62Bg-238a
(22374-PC)
, Mc Carthy
, Golden Horn Limestone Lentil, northeastern part of quadrangle south of Skolai Creek; 3.56 miles S. 9 deg. E. of triangulation Coal. Lat. 61 deg. 38'36", long 142 deg. 14'6".
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crinoid columnals, indet.
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62Bg-242F
(22375-PC)
, Mc Carthy
, Golden Horn Limestone Lentil, northeastern part of quadrangle south of Skolai Creek; 3.50 miles S. 15 deg. E. of triangulation Coal. Lat. 61 deg. 38'42", long. 142 deg. 13'45".
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crinoid columnals, indet.
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62Bg-267a
(22376-PC)
, Mc Carthy
, Hasen Creek Formation, east of Nizina Glacier and north of Moonshine Creek; 2.78 miles S. 83 deg. W. of triangulation Foothill. Lat. 61 deg. 37'57", long 142 deg. 24'54".
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crinoid columnals, indet.
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62Bg-270F
(22378-PC)
, Mc Carthy
, Hasen Creek Formation, west-central part of quadrangle east of the Nizina Glacier. Lat. 61 deg. 38'9", long. 142 deg. 24'55". (from Smith and MacKevett, 1970) [Rowett, 1975, p. 71 provides following description: Hasen Creek Formation; west-central part of McCarthy C-4 quad. east of Nizina Glacier; lat 61 deg. 38'09" N., long 142 deg. 24'55" W., Collectors: E.M. MacKevett, Jr., H.C. Berg, and George Plafker, 1962.]
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62APr-11D
(22379-PC)
, Mc Carthy
, Hasen Creek Formation, limestones and shales near south border of quadrangle north of the Chitistone River; 4.3 miles N. 76 1/2 deg. W. of southeast corner of quadrangle. Lat. 61 deg. 31'1", long. 142 deg. 15'56".
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small spiriferoid, indet.
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Straparollus (Euomphalus) sp.
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62APr-11E
(22380-PC)
, Mc Carthy
, Hasen Creek Formation, slabby limestone about 200 feet S. 9 deg. E. of 62APr-11D and probably lower stratigraphically. (from Smith and MacKevett, 1970) [Rowett, 1975, p. 71 provides following description: Hasen Creek Formation; slabby limestones about 200 ft S 9 deg. E. of locality 62APr-11D and "probably lower stratigraphically." Lat. 61 deg. 31'01" N., long 142 deg. 15'56" W. Collectors: E.M. MacKevett, Jr., H.C. Berg, and George Plafker, 1962.]
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crinoid columnals, indet.
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Horridonia, small sp. ....
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... (or Liosotella pseudohorrida (Wiman)) productoid fragment indet.
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.... (or smoothly weathered Spiriferella sp.)
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62APr-19G
(22381-PC)
, Mc Carthy
, Hasen Creek Formation, northeastern part of quadrangle; 1.47 miles N. 36 1/2 deg. W. from triangulation Coal. Lat. 61 deg. 42'39", long 142 deg. 16'54".
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crinoid columnals, indet.
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productoid fragment (Krotovia? or ......
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62APr-25E
(22382-PC)
, Mc Carthy
, Golden Horn Limestone Lentil, near Golden Horn; 0.75 mile S. 74 1/2 deg. W. from triangulation Coal. Lat 61 deg 41'27", long 142 deg. 16'15". (from Smith and MacKevett, 1970) [Rowett, 1975, p. 71 provides following description: Hasen Creek Formation, Gold Horn Limestone Lentil; near Golden Horn, 0.75 mile S. 74 1/2 deg. W. from triangulation station COAL; lat. 61 deg. 41'27" N., long 142 deg. 16'15" W. Collectors: E.M. MacKevett, H.C. Berg, and George Plafker, 1962.]
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crinoid columnals, indet.
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spiriferoid brachiopod, indet.
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62APr-35D
(22383-PC)
, Mc Carthy
, Hasen Creek Formation, limestone from west-central part of quadrangle east of Nizina Glacier; 1.71 miles S. 29 deg. E. of triangulation Foothill. Lat 61 deg. 36'54", long. 142 deg. 22'23".
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crinoid columnals, indet.
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62APr-56G
(22384-PC)
, Mc Carthy
, Hasen Creek Formation float, north-central part of quadrangle; 1.6 miles S. 60 deg. W. of triangulation Coal.
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crinoid columnals, indet.
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"Spirifer" sp. (of the S. striatoplicatus type)
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Spiriferella sp. (abundant)
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62APR-68G
(22385-PC)
, Mc Carthy
, Golden Horn Limestone Lentil; 1.65 miles S. 52 1/2 deg. E. from northwest corner of quadrangle. Lat 61 deg. 43'57", long 142 deg. 28'30".
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crinoid columnals, indet.
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productoid fragments (Chaoiella? sp.)
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Spiriferella sp. (fragments)
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62APr-77D
(22386-PC)
, Mc Carthy
, Hasen Creek Formation, sandstone in prong in Rohn Glacier near northern boundary of quadrangle; 2.43 miles S. 83 deg. E. from northwest corner of quadrangle. Lat 61 deg. 44'48", long. 142 deg. 25'36".
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brachiopod fragments (spiriferoid and productoid, indet.)
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pelecypod fragments?, indet.
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gastropod fragments, indet.
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62APr-79a
(22387-PC)
, Mc Carthy
, Hasen Creek Formation, at elevation 5,100 feet on east side of Golden Horn. Lat 61 deg. 41'00", long 142 deg. 16'18".
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linoproductoid brachiopod fragment, indet.
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