Stratigraphy of Mid-Cretaceous Blackleaf and Lower part of the frontier formations in parts of Beaverhead and Madison counties, Montana: description of Albian and Cenomanian to Turonian strata in Blacktail, Snowerest, Tendoy, and Gravelly Ranges, and Pioneer and McCartney Mountains, Southwest Montana
Gespeichert in:
| Hauptverfasser: | , |
|---|---|
| Format: | Buch |
| Sprache: | Undetermined |
| Veröffentlicht: |
Washington, D.C.
U.S. Gov. Pr. Office
1988
|
| Schriftenreihe: | United States Geological Survey: Geological Survey bulletin
1773 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | IV, 31 S. Ill., Kt. |
Internformat
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| 100 | 1 | |a Dyman, Thaddeus S. |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Stratigraphy of Mid-Cretaceous Blackleaf and Lower part of the frontier formations in parts of Beaverhead and Madison counties, Montana |b description of Albian and Cenomanian to Turonian strata in Blacktail, Snowerest, Tendoy, and Gravelly Ranges, and Pioneer and McCartney Mountains, Southwest Montana |c by Thaddeus S. Dyman and Douglas J. Nichols |
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| adam_text | Stratigraphy of Mid-Cretaceous
Blackleaf and Lower Part of the
Frontier Formations in Parts of
Beaverhead and Madison Counties,
Montana
By THADDEUS S DYMAN and DOUGLAS J NICHOLS
Description of Albian and Cenomanian to Turonian Strata in
Blacktail, Snowcrest, Tendoy, and Gravelly Ranges, and Pioneer
and McCartney Mountains, Southwest Montana
gifv:3-f- • +
y
i
U S GEOLOGICAL SURVEY BULLETIN 1773
CONTENTS
Abstract 1
Introduction 1
Stratigraphy 2
Nomenclature 3
Blackleaf Formation 6
Lower clastic lithofacies (unit 1) 7
Lower mudstone-shale lithofacies (unit 2) 12
Upper clastic lithofacies (unit 3) 17
Volcaniclastic lithofacies (unit 4) 20
Frontier Formation 22
Lower part, lower clastic lithofacies (unit 5) 22
Summary 25
References cited 25
Appendix 31
FIGURES
1 Mounta in r anges in pa rtsof Beaverhead , Madi son , and Ga llat in Coun ties,
southwestern Montana 2
2 Boreholes that penetrate Cretaceous strata in parts of Beaverhead and
Madison Counties, Montana, and adjacent northeastern Idaho 3
3 Map of southwestern Montana and adjacent areas showing outcrops and
sample localities of the Blackleaf and Frontier Formations 5
4 Stratigraphic description of upper part of the Kootenai Formation,
Blackleaf Formation, and the lower part of the Frontier Formation,
Beaverhead and Madison Counties, Montana 6
5 Stratigraphic nomenclature for strata of mid-Cretaceous age in
southwestern Montana, northeastern Idaho, and central Wyoming 7
6 Map showing total Blackleaf Formation thickness in part of southwestern
Montana 10
7 Flat-bedded, iron-stained unit 1 sandstone, Blackleaf Formation, McCart
ney Mountain I section 10
8 Nodular mudstone bed in lower part of unit 1, Blackleaf Formation,
McCartney Mountain I section 11
9 A limestone conglomerate, unit 1, Blackleaf Formation, Lima Peaks
section 12
10 Map showing thicknesses of unit 1, Blackleaf Formation in parts of
southwestern Montana 12
11 External mold of Inoceramus comancheanus Cragin, unit 2, Blackleaf For-
^ mation, Monument Hill section, Gravelly Range 17
12 Outcrop of black shale in gully, lower part of unit 2, Blackleaf Formation,
Monument Hill section, Gravelly Range 17
13 Map showing thicknesses of unit 2, Blackleaf Formation in parts of ,
southwestern Montana 18
14 Sandstone and interbedded yellow-brown mudstone near middle of unit 3,
Blackleaf Formation, Apex section, Pioneer Mountains 18
15 Conglomeratic bed near top of unit 3, Blackleaf Formation, McCartney
Mountain II section 20
Contents III
16 Map showing thicknesses of unit 3, Blackleaf Formation in parts of southwestern
Montana 21
17 Color-variant beds with popcorn texture, unit 4, Blackleaf Formation, Lima
Peaks section 22
18 Map showing thicknesses of unit 4, Blackleaf Formation in parts of southwestern
Montana 23
19 Basal conglomerate beds, unit 5, Frontier Formation, Frying Pan Gulch sec
tion, Pioneer Mountains 24
TABLES
1 Description of boreholes that penetrate mid-Cretaceous rocks in Beaverhead
County, Montana and northern Clark County, Idaho 4
2 Generalized stratigraphic sequence for southwestern Montana 5
3 Historical review of stratigraphic nomenclature for Cretaceous strata in parts
of Beaverhead and Madison Counties, Montana 8
4 Descriptions of molluscan fossils and associated strata in the Blackleaf and Fron
tier Formations, Beaverhead and Madison Counties, Montana 13
5 Descriptions of palynomorphs and associated strata in the Blackleaf and lower
Frontier Formations, Beaverhead and Madison Counties, Montana 14
6 Descriptions of paleobotanical megafossils, Blackleaf and lower Frontier For
mations, Beaverhead and Madison Counties, Montana 19
Blackleaf and Frontier Formations, Beaverhead and Madison Counties, Montana
|
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| geographic | Beaverhead County, Mont. (DE-588)4219826-4 gnd Madison County, Mont. (DE-588)4219825-2 gnd |
| geographic_facet | Beaverhead County, Mont. Madison County, Mont. |
| id | DE-604.BV001232662 |
| illustrated | Illustrated |
| indexdate | 2024-07-09T15:25:36Z |
| institution | BVB |
| language | Undetermined |
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| physical | IV, 31 S. Ill., Kt. |
| publishDate | 1988 |
| publishDateSearch | 1988 |
| publishDateSort | 1988 |
| publisher | U.S. Gov. Pr. Office |
| record_format | marc |
| series | United States Geological Survey: Geological Survey bulletin |
| series2 | United States Geological Survey: Geological Survey bulletin |
| spelling | Dyman, Thaddeus S. Verfasser aut Stratigraphy of Mid-Cretaceous Blackleaf and Lower part of the frontier formations in parts of Beaverhead and Madison counties, Montana description of Albian and Cenomanian to Turonian strata in Blacktail, Snowerest, Tendoy, and Gravelly Ranges, and Pioneer and McCartney Mountains, Southwest Montana by Thaddeus S. Dyman and Douglas J. Nichols Washington, D.C. U.S. Gov. Pr. Office 1988 IV, 31 S. Ill., Kt. txt rdacontent n rdamedia nc rdacarrier United States Geological Survey: Geological Survey bulletin 1773 Mittelkreide (DE-588)4170235-9 gnd rswk-swf Beaverhead County, Mont. (DE-588)4219826-4 gnd rswk-swf Madison County, Mont. (DE-588)4219825-2 gnd rswk-swf Beaverhead County, Mont. (DE-588)4219826-4 g Mittelkreide (DE-588)4170235-9 s DE-604 Madison County, Mont. (DE-588)4219825-2 g Nichols, Douglas J. Verfasser aut United States Geological Survey: Geological Survey bulletin 1773 (DE-604)BV002539394 1773 HEBIS Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=000742051&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Dyman, Thaddeus S. Nichols, Douglas J. Stratigraphy of Mid-Cretaceous Blackleaf and Lower part of the frontier formations in parts of Beaverhead and Madison counties, Montana description of Albian and Cenomanian to Turonian strata in Blacktail, Snowerest, Tendoy, and Gravelly Ranges, and Pioneer and McCartney Mountains, Southwest Montana United States Geological Survey: Geological Survey bulletin Mittelkreide (DE-588)4170235-9 gnd |
| subject_GND | (DE-588)4170235-9 (DE-588)4219826-4 (DE-588)4219825-2 |
| title | Stratigraphy of Mid-Cretaceous Blackleaf and Lower part of the frontier formations in parts of Beaverhead and Madison counties, Montana description of Albian and Cenomanian to Turonian strata in Blacktail, Snowerest, Tendoy, and Gravelly Ranges, and Pioneer and McCartney Mountains, Southwest Montana |
| title_auth | Stratigraphy of Mid-Cretaceous Blackleaf and Lower part of the frontier formations in parts of Beaverhead and Madison counties, Montana description of Albian and Cenomanian to Turonian strata in Blacktail, Snowerest, Tendoy, and Gravelly Ranges, and Pioneer and McCartney Mountains, Southwest Montana |
| title_exact_search | Stratigraphy of Mid-Cretaceous Blackleaf and Lower part of the frontier formations in parts of Beaverhead and Madison counties, Montana description of Albian and Cenomanian to Turonian strata in Blacktail, Snowerest, Tendoy, and Gravelly Ranges, and Pioneer and McCartney Mountains, Southwest Montana |
| title_full | Stratigraphy of Mid-Cretaceous Blackleaf and Lower part of the frontier formations in parts of Beaverhead and Madison counties, Montana description of Albian and Cenomanian to Turonian strata in Blacktail, Snowerest, Tendoy, and Gravelly Ranges, and Pioneer and McCartney Mountains, Southwest Montana by Thaddeus S. Dyman and Douglas J. Nichols |
| title_fullStr | Stratigraphy of Mid-Cretaceous Blackleaf and Lower part of the frontier formations in parts of Beaverhead and Madison counties, Montana description of Albian and Cenomanian to Turonian strata in Blacktail, Snowerest, Tendoy, and Gravelly Ranges, and Pioneer and McCartney Mountains, Southwest Montana by Thaddeus S. Dyman and Douglas J. Nichols |
| title_full_unstemmed | Stratigraphy of Mid-Cretaceous Blackleaf and Lower part of the frontier formations in parts of Beaverhead and Madison counties, Montana description of Albian and Cenomanian to Turonian strata in Blacktail, Snowerest, Tendoy, and Gravelly Ranges, and Pioneer and McCartney Mountains, Southwest Montana by Thaddeus S. Dyman and Douglas J. Nichols |
| title_short | Stratigraphy of Mid-Cretaceous Blackleaf and Lower part of the frontier formations in parts of Beaverhead and Madison counties, Montana |
| title_sort | stratigraphy of mid cretaceous blackleaf and lower part of the frontier formations in parts of beaverhead and madison counties montana description of albian and cenomanian to turonian strata in blacktail snowerest tendoy and gravelly ranges and pioneer and mccartney mountains southwest montana |
| title_sub | description of Albian and Cenomanian to Turonian strata in Blacktail, Snowerest, Tendoy, and Gravelly Ranges, and Pioneer and McCartney Mountains, Southwest Montana |
| topic | Mittelkreide (DE-588)4170235-9 gnd |
| topic_facet | Mittelkreide Beaverhead County, Mont. Madison County, Mont. |
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| volume_link | (DE-604)BV002539394 |
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