Reference Detail of

Report on Referred Fossils
Edit Reference Add/Edit Sample Sample List Show Map

Stratigraphic range: Mississippian
Kinds of fossils: Marine invertebrates
Quadrangle or area: Point Hope A-2 quad.
Shipment No.: A-60-1
Referred by: Campbell, Russell H.
Report prepared by: Dutro, J. Thomas, Jr. , Duncan, Helen
Date: 10/19/1961

This report covers 24 collections comprising over 300 hundred specimens from two measured sections.

They can be correlated in a broad way with the Mississippian sequences in the central and western Brooks Ranges. The collections are discussed from the top down.

Unit Ml4 appears to correlate with the upper part of the Alapah limestone of the central Brooks Range. Because most of unit Ml4 represents a different facies from the type Alapah, the faunas have a different aspect. Several collections represent a "Chester"-type assemblage of bryozoans, brachiopods, and echinoderms. Collection 55 best represents this assemblage, with Archimedes and Pentremites and several kinds of brachiopods.

In a broad way, these collections correlate with the Gigantoproductus zone of the central Brooks Range. Gigantoproductus has been found in similar rocks near Cape Lisburne, north of the Point Hope area, although none appear in this shipment.

Collections above 56 are poorly preserved in a dolomitic matrix and cannot be definitive in terms of age or correlation.

Unit Ml3, except for the basal part, is probably equivalent to the lower part of the Alapah limestone. There is a wide variety of lithostrotionoid corals, like those found in the Lithostrotion aff. L. asiaticum (Yabe and Hayasaka) through Sciophyllum lambarti (Harker and McLaren) zones of the central Brooks Range sequence.

The basal part of unit Ml3, including collections 11, 12, 13, 123 and 122, is probably correlative with the upper part of the Wachsmuth limestone, the Brachythyris suborbicularis (Hall) zone.

The single collection from Ml2 contains no definitive fossils but since this unit is bracketed by Wachsmuth age collections, it too can be be considered a correlative of the upper Wachsmuth.

Collection 119, from unit Ml1, also represents the upper part of the Wachsmuth and is similar to collection 123. Therefore, units Ml1, Ml2 and the lower part of Ml3 can be considered of Osage age.

Unit Ml1, and the upper part of the unnamed clastic unit below, I would consider equivalent to the Utukok Formation of the western De Long Mountains. Units Ml2, Ml3 and probably Ml4 would be equivalent to the Kogruk Formation. Unit Ml5 is a Tupik equivalent. I suspect that repetition by faulting may have resulted in too thick a measurement for unit Ml4 and too thin a measurement for Ml5. In 1951, we measured at least 490 feet of the Ml5, Tupik equivalent. From the measured sequence, as transmitted with the examination request, I would suggest that only about 2400 feet is certainly assignable to Ml4. The upper part may be repetitions of Ml4 and Ml5. In addition, there is evidence of intertonguing of the Ml4 and Ml5 facies, not only in the Point Hope area but also in the central Brooks Range. This usually complicates any cut-and-dried formations in the upper part of Alapah equivalents.


***
Brief statement of problem and remarks (from collector):
This collection was made in conjunction with careful section measurements on good sea cliff exposures. It is intended to represent the fauna of the Lisburne Group in this area and may serve as a standard to which faunal collections from less-well-exposed sequences may be referred. It would be helpful to know if the fossils indicate correlations with certain Lisburne formations elsewhere, and if so which ones. Please note especially similarities of and differences between 59ACr-13f, 12f and 59ACr-122f, 123f. Sequence indicates these zones are correlative.

User Note module to be added
59ACr74f (18990-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 06.9'N, Long. 165 deg. 53.4'W. Coords. (8.10, 8.00) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr74f to be in unit Ml4]
zaphrentid corals, genus undet. (fragments only)
59ACr73f (18989-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 06.8'N, Long. 165 deg. 53.1'W. Coords. (8.15, 7.90) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr73f to be in unit Ml4]
zaphrentoid coral fragments, indet.
productoid fragment, indet.
59ACr68f , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 06.8'N, Long. 165 deg. 52.8'W. Coords. (8.30, 7.85) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr68f to be in unit Ml4]
echinoderm debris, indet.
horn coral, indet.
productoid fragments, indet.
59ACr62f (18988-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 06.7'N, Long. 165 deg. 52.5'W. Coords. (8.45, 7.75) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr62f to be in unit Ml4]
horn corals, indet.
fenestrate bryozoan, indet.
59ACr59f (18987-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 06.7'N, Long. 165 deg. 52.2'W. Coords. (8.55, 7.70) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr59f to be in unit Ml4]
horn corals, indet.
fenestrate bryozoan, indet.
brachiopods, indet.
59ACr56f (18986-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 06.6'N, Long. 165 deg. 51.9'W. Coords. (8.70, 7.65) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr56f to be in unit Ml4]
syringoporoid, undet.
Diphyphyllum? sp. indet.
59ACr55f (18985-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 06.6'N, Long. 165 deg. 51.8'W. Coords. (8.75, 7.65) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr55f to be in unit Ml4]
Pentremites sp.
Archimedes sp.
fenestrate bryozoans
Avonia sp.
productoid, indet.
Spirifer aff. S. increbescens Hall
Eumetria? sp.
terebratuloid, indet.
59ACr52f (18984-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 06.6'N, Long. 165 deg. 51.7'W. Coords. (8.80, 7.61) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr52f to be in unit Ml4]
horn corals, indet.
fish teeth, indet.
59ACr29f (18983-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 06.6'N, Long. 165 deg. 51.5'W. Coords. (8.85, 7.60) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr29f to be in unit Ml4]
Caninia sp.
Diphystrotion sp.
Lithostrotionella sp.
59ACr27f (18982-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 06.5'N, Long. 165 deg. 51.4'W. Coords. (8.90, 7.55) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr27f to be in unit Ml4]
Faberophyllum? sp. undet.
bryozoan fragments, indet.
59ACr24f (18981-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 06.5'N, Long. 165 deg. 51.1'W. Coords. (8.98, 7.53) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr24f to be in unit Ml4]
Syringopora sp.
Lithostrotionella sp. 1
Lithostrotionella sp. 2
Echinoconchus? sp.
59ACr23f (18980-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 06.5'N, Long. 165 deg. 51.0'W. Coords. (9.00, 7.52) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr23f to be in unit Ml4]
Lithostrotionella sp. 2?
59ACr22f (18979-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 06.5'N, Long. 165 deg. 50.9'W. Coords. (9.05, 7.50) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr22f to be in unit Ml3]
Echinoconchus sp.
"Dictyoclostus" sp.
Martinia? sp.
59ACr1f (18978-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 06.5'N, Long. 165 deg. 50.8'W. Coords. (9.10, 7.50) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr1f to be in unit Ml3]
Cyathoclisia? sp.
Hexaphyllia sp.
Lithostrotionella sp.
Archimedes sp.
fenestrate bryozoans, undet.
spiriferoid brachiopod, indet.
59ACr8f (18977-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 06.4'N, Long. 165 deg. 50.6'W. Coords. (9.25, 7.45) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr8f to be in unit Ml3]
Caninia sp.
Diphyphyllum aff. D. ingens Hall
Siphonodendron aff. S. pauciradiale (McCoy)
Lithostrotionella sp.
59ACr8Af (18976-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 06.4'N, Long. 165 deg. 50.5'W. Coords. (9.30, 7.45) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr8Af to be in unit Ml3]
Caninia sp.
Diphyphyllum sp.
59ACr11f (18975-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 06.4'N, Long. 165 deg. 50.2'W. Coords. (9.40, 7.40) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr11f to be in unit Ml3]
Fenestella sp. indet.
Cystodictya? sp. indet.
59ACr12f (18974-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 06.4'N, Long. 165 deg. 50.0'W. Coords. (9.50, 7.36) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr12f to be in unit Ml3]
crinoid columnals, indet.
Zaphrentites? sp.
Fenestella sp. indet.
Cystodictya? sp. indet.
59ACr13f (18972-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 06.4'N, Long. 165 deg. 49.9'W. Coords. (9.52, 7.35) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr13f to be in unit Ml3]
"Dictyoclostus" sp.
59ACr123f (18973-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 06.8'N, Long. 165 deg. 58.8'W. Coords. (5.75, 10.20) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr123f to be in unit Ml3]
Zaphrentites? sp. (poor material)
"Dictyoclostus" sp. (like 13?)
Brachythyris aff. B. suborbicularis (Hall)
Dimegelasma? sp.
spiriferoid fragments, indet.
59ACr122f (18971-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 08.75'N, Long. 165 deg. 58.8'W. Coords. (5.75, 10.10) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr122f to be in unit Ml3]
productoid brachiopod, indet.
59ACr120f , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 08.6'N, Long. 165 deg. 58.6'W. Coords. (5.75, 9.90) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr120f to be in unit Ml2]
echinoderm debris, indet.
59ACr119f (18970-PC) , Point Hope , No description given in Dutro and Duncan E&R report of 10/19/61; however, transmittal sheet of Campbell, dated Dec. 2, 1959, provides following: "Lat. 68 deg. 08.5'N, Long. 165 deg. 58.5'W. Coords. (5.85, 9.85) - See attached columnar section for data on lithology and stratigraphic position of collections." [Note by R.B. Blodgett: the attached columnar section indicates 59ACr8f to be in unit Ml1]
Michelinia sp.
Syringopora sp.
Canadiphyllum? sp.
Siphonodendron sp.
"Dictyoclostus" sp.
Spirifer aff. S. keokuk Hall
Spirifer sp. (large)
Brachythyris aff. B. suborbicularis (Hall)
Loxonema sp.