Surficial geologic maps along the riparian zone of the Animas River and its headwater tributaries, Silverton to Durango, Colorado, with upper Animas River watershed gradient profiles

DATABASE STRUCTURE--The database structure of the map consists of one coverage, SURF_DEP, with the following INFO attribute items.

AREA
PERIMETER
SURF_DEP #
SURF_DEP-ID
DEPOSIT_TYPE
VALUE

The coverage SURF_DEP contains all contact lines and label points for each polygon. The SURF_DEP.PAT INFO file has attribute fields for INFO ITEMS DEPOSIT_TYPE and VALUE. DEPOSIT_TYPE corresponds to a unique symbol that identifies specific surficial deposit types. Some units have a mixed deposit type such as b/t where both bog and terrace deposits represent a polygon. VALUE is a unique numeric identifier that represents each general class of surficial deposits. Note that where a mapped unit has multiple generations of terraces that are represented by t1, t2, and t3 in the DEPOSIT_TYPE field, these have the same numeric VALUE. The VALUE attribute also corresponds to the ArcInfo colornames.shd symbolset number used for color shading. The following detailed overview discusses all of the non-common attributes included in the SURF_DEP coverage:
The ITEM DEPOSIT_TYPE is described as follows:

H = Human-related deposits and structures
Fp = floodplain deposits
Rfp = reworked floodplain deposits
T = terrace deposits undifferentiated based on comparative relative ages
t1,t2,t3,t4 = terrace deposits, with higher number corresponding to older terraces
rt = reworked terrace
rt1 = reworked terrace (relative order of formation 1)
rt2 = reworked terrace (relative order of formation 2)
vd = valley deposits
rvd = reworked valley deposits
ovd = old valley deposits
ox = oxbow deposits, abandoned channels
f = fan deposits undifferentiated based on comparative relative ages
f1,f2,f3 = fan deposits, with higher number corresponding to older fans
rf = reworked fan
b = bog deposits
ib = iron bog deposits
c = colluvial deposits
rc = reworked colluvium
dc = debris cone deposits
ta = talus deposits
ls = landslide deposits
ls1,ls2 = landslide deposits, with higher number corresponding to older landslides
m = glacial till
ma,ms = Animas City (ma) and Spring Creek (ms) glacial till deposits
m? = possible glacial till
rm = reworked glacial till
rm? = possible reworked glacial till
c/ovd = mixed colluvial and old valley deposits
c/m = mixed colluvial and glacial till deposits
m/c = mixed glacial till and colluvial deposits
f/m = mixed fan and glacial till deposits
ls/m = mixed landslide and glacial till deposits
t/m = mixed terrace and glacial till deposits
f/t = mixed fan and terrace deposits
t/b = mixed terrace and bog deposits
B/c = mixed bedrock and colluvial deposits
B/fp = mixed bedrock and floodplain deposits
B/ls = mixed bedrock and landslide deposits
B/m = mixed bedrock and glacial till deposits
td = travertine deposits
B = bedrock
rB = reworked bedrock
w = water
L =lake

The INFO file item VALUE is populated with a numeric value that corresponds to the ArcInfo colornames.shd shadeset file and is also a unique value that represents each general class of surficial deposit types. Note that a deposit type with multiple generations of deposits such as t1, t2, and t3 have the same numeric value. Also, when there are mixed units, the value recorded in the VALUE field represents the first deposit type reported in the mixed deposit, that is, the value for t in the case of the unit t/b. The DEPOSIT_TYPES and corresponding numeric VALUE attributes are as follows:

H = 4
fp = 3
t = 6
vd = 10
rvd = 10
ovd = 12
ox = 86
f = 13
rf = 13
f1 = 13
f2 = 13
f3 = 13
f/m = 13
b = 8
ib = 14
c = 82
rc = 82
dc = 18
ta = 80
ls = 17
ls1 = 17
ls2 = 17
m = 81
ma = 81
ms = 81
m? = 81
rm = 81
rm? = 81
c/ovd = 82
c/m = 82
m/c = 81
f/m = 13
ls/m = 17
t/m = 6
f/t = 13
t/b = 6
B/c = 25
B/fp = 25
B/ls = 25
B/m = 25
td = 109
B = 25
rB = 25
w = 21
L = 21