1. Graphical & Statistical Analysis
GRAIN SIZE ANALYSIS:
Graphical & Statistical Analysis

2. Graphical & Statistical Analysis
GRAIN SIZE ANALYSIS:
Graphical & Statistical Analysis

3. Graphical & Statistical Analysis
GRAIN SIZE ANALYSIS:
Graphical & Statistical Analysis

4. Grain size distribution is a function of several interacting processes:
Weathering in source area.
Transport by mobile Agents
a) Breakdown of grains
b) Selective sorting because of grain differences in size, shape, density.
3) Modification by local conditions in depositional area.
4) Diagenesis

5. Overall Distribution of All Sediments
GRAIN SIZE ANALYSIS:
Overall Distribution of All Sediments

6. Why the “doglegs” (breaks) in the curve?
Shea (1974) concluded:
Size distribution of parent
material
2) Long term abrasion during transport.
Not:
Modification in local depositional areas