Sources of Data for Preliminary Geologic Map of Contra Costa County, 
California:  A Digital Database
(U.S. Geological Survey Open-file Report 94-622)

See coverage cc_so/ for index map.
See ccref.txt for complete reference listings.

1.	Wagner (1978), and Sheehan (1956).  See also Dibblee (1981a), 
and Weaver (1953).  Extensive field checking by Graymer, Jones, 
and Brabb, 1990-92.

2.	Sonneman and Switzer (Unpublished maps, EXXON, 1961-62), 
and Wagner (1978).  See also Dibblee (1980b) and Weaver (1953).  
Some field checking by authors.

3.	Sonneman and Switzer (Unpublished maps, 1961-62).  See also 
Dibblee (1981b), and Weaver (1953).

4.	Sonneman and Switzer (Unpublished maps, 1961-62).  See also 
Dibblee (1980h).  Some field checking by authors.

5.	Sonneman and Switzer (Unpublished maps, 1961-62).  See also 
Dibblee (1980 a, d, j, m), Oestreich (1958), Preston (1965), Snow 
(1957), Colburn (1961, 1962, 1964), Taft (1935), Primmer 
(1964), Woodward-Clyde Consultants (1988), and Brabb and others 
(1971).  Some field checking by authors.

6.	Sonneman and Switzer (Unpublished maps, 1961-62).  Some 
data from Pampeyan (1963), Dibblee (1980e), and Fulmer (1956).  
See also Brabb and others (1971), Williams (1984), and Primmer (1964).  
Extensive field checking and modification by authors.

7.	Sonneman and Switzer (Unpublished maps, 1961-62), and 
Wagner (1978).  See also Dibblee (1980n), Saul (1967), Lutz 
(1951), Schmidt (1958), Kilmer (1953), Doumani (1957), Newton 
(1948), and Weaver (1953).  Extensive field checking and 
modification by authors.

8.	Wagner (1978), and Pease (1954).  See also Dibblee (1980c), 
and Doumani (1957).  Extensive field checking and modification by 
authors.

9.	Wagner (1978), and Sheenan (1956).  Some data from Blake 
and others (1974), Dibblee (1980k), and Radbruch and Case (1967).  
Extensive field checking and modification by authors.

10.	Blake and others (1974)

11.	Radbruch (1969).  Extensive field checking and modification by 
authors.

12.	Wagner (1978).  Some data from Ham (1952), Dibblee (1980i), 
Aarons (1958), and Sonneman and Switzer (Unpublished maps, 
1961-62).  Some field checking and modification by authors.

13.	Sonneman and Switzer (Unpublished maps, 1961-62).  Some 
data from Pampeyan (1963), Colburn (1961, 1962, 1964), Webb 
and Woodburn (1964), Kilmer (1953), Newton (1948), Taft 
(1935), Brabb and others (1971), and Dibblee (1980f).  See also
Isaacson (1990).  Extensive field checking and modification by authors.

14	Wagner (1978), and Sonneman and Switzer (Unpublished maps, 
1961-62).  Some data from Dibblee (1980g).