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Table 3 Orientation of ammonites in the “sculpture”

From: 3-D orientation and distribution of ammonites in a concretion from the Upper Cretaceous Pierre Shale of Montana

Study no.

AMNH no.

Species

Dip angle (°)

Dip direction (°)

Highest point

Side up

7A1

85445

crassus

60

110

Phrag

R

7D1

85454

crassus

85

265

Shaft

LNV

8A1

85450

crassus

85

270

Hook

RNV

8A2

85453

salt

20

70

Shaft

L

8A3

85447

salt

20

110

Phrag

R

8A4/10A2

85443

salt

90

Adap bc

V

8A5

85449

salt

20

80

Phrag

L

8A6

85446

crassus

50

100

Phrag

L

8A7

85452

salt.

60

65

Phrag

L

8A8

85451

plenus

70

50

Apt

R

8A9

85448

?

60

10

Phrag

L

10A1

85444

crassus

30

180

Phrag

L

12C1

85481

plenus

90

Adap bc

V

13A1

85455

crassus

30

130

Shaft

L

14A1

85461

crassus

5

70

Shaft

L

14A2

85458

salt

65

150

Phrag

R

14A4

85457

crassus

12

180

Adap bc

L

14A5

85467

crassus

15

330

Apt

L

16-1

85465

crassus

10

100

Phrag

L

16-2

85463

crassus

50

145

Apt

L

16-3

85470

crassus

0

Adap bc

L

16-4

85471

salt.

75

250

Hook

RNV

16-5

85473

plenus

65

135

Apt

L

16-7

85472

crassus

60

120

Adap bc

L

16-9

85464

plenus

15

135

Shaft

L

  1. plenus = Hoploscaphites plenus; crassus = H. crassus; salt = H. saltgrassensis; Adap bc = adapical part of body chamber; Apt = aperture; L = left; LNV = left, but nearly vertical (75°–85°); Phrag = phragmocone; RNV = right, but nearly vertical (75°–85°); R = right; V = vertical