Geological References Scales And Charts

Boulders

256 mm

3

2

5

4

8

7

6

9 cm

By: B. Esrafili-Dizaji 2009

Sphericity 128

-8 phi

Lg. Cobbles -7

High sphericity

V. Lg. Pebbles

-6

64

Sml. Cobbles

1

Low sphericity

32

-5 Lg. Pebbles

2

1

0 Roundness

V. Angular

Angular

3

Sub. Angular

Sub. Rounded

4

5 Rounded

WellRounded

6

8 4mm

I

1500

se ar co

m 5m

375

0.2

m

very coarse By: B. Esrafili-Dizaji 2009

bb

le

s

4 mm

125

I

u

Silt

4

63

95

es

ul

pe

an

Very Fine Sand

2m

m

250

fine

gr

Fine Sand

0.5 mm 1m

3

2.0 phi

1000 500

m

Medium Sand

iu

1

0.7

2000 u

0.5

Very Poorly Sorted

Poorly Sorted

ed

2

Moderately Sorted

750

Sml. Pebbles

Well Sorted 0.35

187

-2

Granules

-1 Very Coarse Sand

Very Well Sorted

m

Coarse Sand

0

Scale in cm

-3

Med. Pebbles

-4

16

Sorting

By: B. Esrafili-Dizaji 2009

Yellow

LYellow Orange

Yellow Orange

Tan

L Yellow Green

Yellow -Green

Green

L. Yellow Blue

Dark Green

Orange

Light Brown

Brown

Red Orange

Red

Deep Red

Red Violet

Pink

Rust

Red Blue

Blue Violet

Violet

Yellow Blue

Blue Green

Light Blue

Blue

Olive

Dark Blue

Purple

Gray

Black

Dark Gray

Color Identification Chart