SECOND ANNUAL REPORT—FULLERS EARTH. 
275 
Yellow plastic clays containing some 
sand .. 
Greenish sticky clay with aluminous 
taste. This clay contains a small 
amount of sand. Upon drying it 
contracts, forming cubical blocks 
and ultimately falls into small pieces 
feet 
134 to 141 feet. 
(exposed) .. 
9 
feet 
125 
to 
134 
5. 
Covered and sloping . 
45 
feet 
80 
to 
125 
4. 
Sand, blue in fresh exposure, yellow up¬ 
on decav ... 
6 
feet 
74 
to 
80 
3. 
Covered ... 
2 
feet 
72 
to 
74 
2. 
Calcareous sands (exposed). 
12 
feet 
60 
to 
72 
1 . 
Covered to the water level (about) .... 
60 
feet 
0 
to 
60 
feet. 
feet. 
feet. 
feet. 
feet. 
The covered interval as given here is based upon barometer readings several 
times checked. These readings give the top of this section as about 200 feet 
above the river. 
Section at Alum Bluff, Liberty County. 
The following section was made at Alum Bluff a short distance 
north of the middle of the bluff at a point where a recent landslide 
(reported to have occurred in 1905 or 1906) has left the bluff bare of 
vegetation (see pi. 1). The measurements of this section were made 
by hand level. 
Thickness Height above river 
of stratum, (stage of Mar. 5, 1909). 
8. 
Pale 3 'ellow incoherent sand.. 
30 
feet 
136 
to 
166 
feet. 
7. 
Reddish and purple sands and sandy 
clays partly covered toward the base 
70 
feet 
66 
to 
136 
feet. 
6. 
Covered . 
6 
feet 
60 
to 
66 
feet. 
5. 
Dark colored sandy non-fossiliferous 
clays, in places tasting of alum. 
17 
feet 
43 
to 
60 
feet. 
4. 
Dark or gray marls, highly fossiliferous 
14 
feet 
29 
to 
43 
feet. 
Unconformity. 
3. 
Laminated and cross bedded sands and 
clays, and blue sands; in places 
• 
absent ... 
3 
feet 
26 
to 
29 
feet. 
Apparent unconformity. 
2 
Light gray calcareous sands or sand¬ 
stone . 
16 
feet 
10 
to 
26 
feet. 
1 . 
Sands, slightly indurated and weathering 
yellow upon exposure .. 
10 
feet 
0 
to 
10 
feet. 
The light gray sandstone (No. 2) of this section 
is apparently the 
same as No. 4 of the Rock Bluff section (p. 273), the stratum having- 
been recognized at several intermediate localities along the river bluff 
between the two localities and on tributaries entering the river. 
Samples from this stratum gave the following analyses. No. 1 is from 
