D , C ompos i t ion — 0 on tin ued . 
1 . Inorganic const! tuents — Oontin u ed . 
d. Character of surface: Glossy, smooth, mat, pitted, chattel 
marked, etc. 
c. Orientation : If not eQuidimensional, direction of greater 
dimensions with respect to bedding, to each other, etc. 
/. Chemical and internal physical condition: Fresh, weathered, 
decomposed, cracked, etc. 
g. Packing: Closeness and manner. 
h. Pore space. 
i. Cement: Present or absent; proportion; composition; 
variations in composition vertically and laterally and in i elation 
to other characters; disposition with respect to bedding, frac- 
tures, etc. 
j. Color: Wet or dry; location, inherent or as a stain in 
constituents or cement; variations and their relation to other 
factors, as composition, porosity, bedding, fracturing, fossils. 
£. Organic constituents. 
a. Kinds. 
h. Size: Does the distribution of sizes show effects of mechan- 
ical deposition? 
c. Condition; Entire, fragmented, partly dissolved, etc. De- 
lation to kinds. 
d. Distribution : With respect to character of beds, kinds of 
organisms, bedding, evidence of burrowing, etc. 
e. Orientation: With respect to bedding; with respect to 
life habit's, possible manner of death, etc. 
E. Concretions. 
1. Form, size, color, composition, and their variations. 
2. Internal structure; central nucleus organic or inorganic; central 
hollow; homogeneous; banded horizontally, concentrically, etc. ; radial; 
compact ; vesicular. 
3. Boundary against country rock: Sharp, transitional with or 
without change in character. 
4. Relation of bedding to concretions: Continuous through concre- 
tions; deflected above, below, or both; thinned above, below, etc. 
5. Distribution: Random; regular; if regular, intervals between 
groups (layers), vertically and horizontally; differences between char- 
acters of concretions in different groups (layers). Delation of distri- 
bution to other characters, as mechanical, chemical, or organic compo- 
sition of country rock; jointing, Assuring, folding, etc., of country rock: 
topography ; ground-water level ; etc. 
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