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KIRTLEY F. MATHER 
A. Hypothetical rock with large spherical 
grains, inaximam pore space. 
B. Hypothetical rock with large spherical 
grains, minimum pore space. 
C. Hypothetical rock with small spherical D. Hypothetical rock with small spherical 
grains, maximum pore space. grains, minimum pore space. 
E. Irregular grains with- 
out cement, showing maximum 
pore space. 
F. Irregular grains 
with interspaces partly 
filled with cement. 
G. Irregular grains with 
interspaces completely filled 
with cement,, no pore space. 
Fig. 1. Pore Space op Rocks 
(Reproduced with permission from Geological Survey of Kansas, Bull. 3, pi. 
Ill, 1917) 
