Birdbear Formation (Late Devonian)of North Dakota

A Core AtlasJeffrey W. Bader

GEOLOGIC INVESTIGATION NO. 226NORTH DAKOTA GEOLOGICAL SURVEYEdward C. Murphy, State GeologistLynn D. Helms, Director Dept. of Mineral Resources2019

A

B

C

B

D

Cycle 1(part)

Cycle 2(part)

A

C

B

D

Neutron Porosity

Density Porosity

Resistivity

Gamma Ray

Original

Original

Jeffrey W. Bader

medium dark gray

dark gray

dark greenish gray

yellowish gray

NO

RTH DAKOT

A

GE

OLOGICAL S

URV

EY

1895

Core - 9 ft = Log

Table of Contents

Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2NDIC No. 207 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3NDIC No. 793 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4NDIC No. 2967 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5NDIC No. 5921 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6NDIC No. 6642 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7NDIC No. 9045 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8NDIC No. 10776 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9NDIC No. 11434 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10NDIC No. 12249 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11NDIC No. 12962 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12NDIC No. 13698 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13NDIC No. 15412 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14NDIC No. 21139 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15NDIC No. 24456 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16NDIC No. 25688 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17NDIC No. 26582 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figures

Figure 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

i

This document presents detailed lithologic descriptions from 16 select Birdbear Formation rock cores across the state of North Dakota (Fig. 1). Cores were viewed and described at the Wilson M. Laird Core Library from February to August 2019, and during August 2018. Core profiles including: 1) Well information; 2) log responses for gamma-ray, resistivity, neutron porosity, and density porosity; 3) detailed lithology graphic with generalized description; 4) sequence stratigraphic graphic showing interpreted shallowing-upwards cycles; and 5) core photographs, are presented. Printing on 11x17 is recommended for optimal graphics.

Explanation

McKenzie

Williams

Divide

Mountrail

North Dakota

MapArea

BurkeRenville

BottineauRolette

McHenryWard

Golden Valley

Billings

Dunn

Slope

Bowman

Towner

Pierce

Benson

McLean

Mercer

Sheridan

Oliver

Morton

Hettinger

Adams

Wells

StutsmanKidderBurleigh

GrantEmmons

Logan

McIntosh

Sioux

Figure 1.

Stark

15 mi0

120 24 km

207

793

21139

26582

15412

12249

12962

10776

24456

256885921

2967

6642

13698

11434

9045

793 Well Location with NDIC number

1

Anhydrite

Dolostone

Limestone

Shale

Claystone

Mudstone

Siltstone

Amphipora

Anhydritic

Anhydrite-Bladed

Anhydrite-Nodular

Brachiopod

Brecciated/Disrupted Bedding

Burrow

Carbonaceous

Cemented Fracture

Coral

Cross Laminated

Dolomitic

Fossil

Gastropod

Intraclast

Ostracod

Pelloid

Ripple Lamination

Rugose Coral

Skeletal Material

Stromatoporoid

Stylolite

Burrow Mottled

Undulatory Bedding

Vuggy Porosity

Wavy Bedding

Legend

DD Duperow Formation

DTF Three Forks Formation

LS Lower Shale (Bakken)

LTF Lower Three Forks

MM Middle Member (Bakken)

UD Upper Devonian2

A

B

C

Gamma Ray

A

B

C

Original

Original

Jeffrey W. Bader

pale pink to pale reddish purple

brownish black

yellowish gray

dusky red to greenish gray

NO

RTH DAKOT

A

GE

OLOGICAL S

URV

EY

1895

Core + 85 ft = Log

3

Cycle 1(part)

Cycle 3

Cycle 4

D

B

C

A

Cycle 2

Gamma Ray

D

C

B

NO

RTH DAKOT

A

GE

OLOGICAL S

URV

EY

1895

A

-102.313085

Original

Original

Jeffrey W. Bader

medium bluish gray

pale yellowish brown to pinkish gray

pinkish gray to medium dark grayolive gray

medium bluish gray

very pale orangebrownish black

light bluish gray to light olive gray

dusky yellowish brown

olive gray

Core = Log

4

Cycle 1(part)

A

B

C

Cycle 2(part)

Resistivity

Gamma Ray

A

B

C

Original

Original

Jeffrey W. Bader

pale yellowish brownbrownish black

medium dark gray

brownish gray to greenish gray

NO

RTH DAKOT

A

GE

OLOGICAL S

URV

EY

1895

Core + 5 ft = Log

5

A

B

C

B

D

Cycle 1(part)

Cycle 2(part)

A

C

B

D

Neutron Porosity

Density Porosity

Resistivity

Gamma Ray

Original

Original

Jeffrey W. Bader

medium dark gray

dark gray

dark greenish gray

yellowish gray

NO

RTH DAKOT

A

GE

OLOGICAL S

URV

EY

1895

Core - 9 ft = Log

6

Cycle 1(part)

Cycle 3

Cycle 4(part)

C

B

D

A

Cycle 2

-

D

C

B

A

Neutron Porosity

Density Porosity

Resistivity

Gamma Ray

Original

Original

Jeffrey W. Bader

dark greenish gray

medium gray to very light gray

pale yellowish brown

light bluish gray to medium dark gray

grayish black to greenish gray

light olive gray

NO

RTH DAKOT

A

GE

OLOGICAL S

URV

EY

1895

Core + 13 ft = Log

7

Cycle 1(part)

Cycle 3(part) A

B

Cycle 2

B

A

Neutron Porosity

Density Porosity

Resistivity

Gamma Ray

Original

Original

Jeffrey W. Bader

very pale orange to paleyellowish brown

greenish gray to medium bluish gray

very pale orange

dark yellowish brown

dusky yellow

grayish yellow

pinkish gray

NO

RTH DAKOT

A

GE

OLOGICAL S

URV

EY

1895

Core - 5 ft = Log

8

Cycle 1(part)

B

A

A

B

Neutron Porosity

Density Porosity

Resistivity

Gamma Ray

Original

Original

Jeffrey W. Bader

dark greenish gray

dark gray

Core + 1 ft = Log

NO

RTH DAKOT

A

GE

OLOGICAL S

URV

EY

1895

9

Cycle 1(part)

Cycle 3

Cycle 4(part)

Cycle 2

A

C

B

A

C

B

Neutron Porosity

Density Porosity

Resistivity

Gamma Ray

Original

Original

Jeffrey W. Bader

dark yellowish brown

very pale orange to dusky yellowish brown

medium bluish gray to medium light gray

very pale orange to darkyellowish brown

dusky yellow

grayish green

pinkish gray

grayish green

pale yellowish brown

pale yellowish brown

pink to black

Core + 4 ft = Log

NO

RTH DAKOT

A

GE

OLOGICAL S

URV

EY

1895

10

A

B

C

E

D

Cycle 1(part)

Cycle 2

Cycle 3

Cycle 4(part)

A

BC

D

E

Neutron Porosity

Density Porosity

Resistivity

Gamma Ray

MOI #

47.472273 -103.707705

Original

Original

Jeffrey W. Bader

brownish black

very light gray to olive gray

light olive brown

light bluish gray

brownish black

greenish gray to light gray

olive black

dark yellowish brown

brownish gray

Core + 4 ft = Log

NO

RTH DAKOT

A

GE

OLOGICAL S

URV

EY

1895

11

D

C

B

A

Cycle 1(part)

Cycle 2

Cycle 3

A

BC

D

10960

NO

RTH DAKOT

A

GE

OLOGICAL S

URV

EY

1895

Neutron Porosity

Density Porosity

Resistivity

Gamma Ray

-

BN SWSE Sec. 35, T148N, R102W

13465

Original

Original

Jeffrey W. Bader

greenish black

dark yellowish brown

bluish whitepale yellowish browngreenish black

bluish white

olive black

Core -10 ft = Log

12

Cycle 1(part)

Cycle 3

Cycle 4(part)

Cycle 2

A

B

C

D

Neutron Porosity

Density Porosity

Resistivity

Gamma Ray

-

SESW Sec. 18, T163N, R95W

AB

C

D

Original

Original

Jeffrey W. Bader

very light gray to light graydusky brown

medium gray to medium light gray

greenish gray

grayish orange

dusky yellow to brownish black

light olive gray

medium dark gray

yellowish gray

brownish gray to olive gray

NO

RTH DAKOT

A

GE

OLOGICAL S

URV

EY

1895

Core - 2.5 ft = Log

13

D

C

B

A

Cycle 2

Cycle 3(part)

Cycle 1(part)

A

B

C

D

10740

10750

47.234713 -103.739459

18368

Beaver Creek

Neutron Porosity

Density Porosity

Resistivity

Gamma Ray

Original

Original

Jeffrey W. Bader

bluish white to light bluish gray

bluish white to light bluish gray

dark yellowish brown

light olive gray

NO

RTH DAKOT

A

GE

OLOGICAL S

URV

EY

1895

Core + 17 ft = Log

14

Cycle 1(part)

A

B

C

D

B

A

C

D

Neutron Porosity

Density Porosity

Resistivity

Gamma Ray

-

Chesapeake Operating, Inc.

NENE Sec. 30, T138N, R95WOriginal

Original

Jeffrey W. Bader

dark reddish brown

dark yellowish green

olive gray

yellowish gray to grayish olive

brownish black

NO

RTH DAKOT

A

GE

OLOGICAL S

URV

EY

1895

Core + 1 ft = Log

15

Cycle 1

Cycle 3

Cycle 4

Cycle 5(part)

B

A

C

D

E

Cycle 2

NO

RTH DAKOT

A

GE

OLOGICAL S

URV

EY

1895

Neutron Porosity

Density Porosity

Resistivity

Gamma Ray

A

B

C

D

E

47.544396 -102.889294

Original

Original

Jeffrey W. Bader

greenish black

white to medium bluish gray

yellowish brown

medium bluish gray

greenish black

greenish gray to light bluish gray

light olive gray

medium dark gray

Core + 14 ft = Log

16

C

A

B

D

Cycle 1(part)

Cycle 4

Cycle 5

Cycle 3

Cycle 2

AB

C

D

577 1297Neutron Porosity

Density Porosity

Resistivity

Gamma Ray

Original

Original

Jeffrey W. Bader

medium dark gray to very light graypale yellowish brown

olive gray

olive gray

olive gray

olive black

grayish orange pink

dark gray

grayish olive

olive gray

dusky yellowish brown

NO

RTH DAKOT

A

GE

OLOGICAL S

URV

EY

1895

Core + 19 ft = Log

17

C

B

D

A

NO

RTH DAKOT

A

GE

OLOGICAL S

URV

EY

1895

Cycle 1

Cycle 2

C

D

B

A

2837

47.005852 -103.827503Neutron Porosity

Density Porosity

Resistivity

Gamma Ray

Original

Original

Jeffrey W. Bader

grayish pink to very light gray

pinkish gray

pinkish gray to medium graydolomitic and

pinkish gray to medium gray

light olive graylight olive gray

medium bluish gray

medium bluish gray

Core - 13 ft = Log

18