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Swiss Journal of Palaeontology

Table 3 (a) Mineral rock components for the six samples of the section “Quebrada Corralito”. (b) Percentages (%) of clay minerals estimated for the samples representing the six facies of the “Quebrada Corralito”

From: Palaeontology, sedimentology, and biostratigraphy of a fossiliferous outcrop of the Early Miocene Querales Formation, Falcón Basin, Venezuela

S

Q

Fsp

Pl

Ca

D

S

Py

Ms

(a)

6

VA

T

VR

VR

T

0

0

R

5

VA

T

VR

T

VR

0

T

R

4

VA

T

VR

T

VR

VR

VR

M

3

VA

T

R

VR

0

VR

VR

M

2

VA

T

R

VR

0

T

0

R

1

VA

T

VR

VR

0

0

0

VR

S

Sm

C

IS

CS

I

K

  

(b)

6

20

5

15

T

10

50

  

5

20

5

10

T

25

40

  

4

15

5

10

T

25

45

  

3

25

T

10

0

25

40

  

2

15

T

10

0

30

45

  

1

30

T

10

T

10

50

  
  1. Notice the abundance of Qz. Categories: VA very abundant (>50 %), A abundant (between 30 and 50 %), M moderate (between 15 and 30 %), R rare (between 5 and 15 %), VR very rare (between 1 and 5 %), T traces (<1 %). Qz quartz, Fsp: feldspar, Pl plagioclase, Ca calcite, D dolomite, S siderite, Py pyrite, Ms mudstone, T traces (<1 %). Notice the abundance of K, and the presence of I in the middle portion of the section. Sm smectite, C chlorite, IS illite–smectite, CS chlorite–smectite, I illite, K kaolinite
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