*************************************************************************
All coverages contain the standardized attributes for arcs and polygons assigned by ARC/INFO.  For arcs these attributes are:
COLUMN--ITEM_NAME----------WIDTH-----OUTPUT-----TYPE---#_DECIMALS
1-------FNODE#---------------4----------5---------B---------\
5-------TNODE#---------------4----------5---------B---------\
9-------LPOLY#---------------4----------5---------B---------\
13------RPOLY#---------------4----------5---------B---------\
17------LENGTH---------------8---------18---------F---------5
25------<cover>#-------------4----------5---------B---------\
29------<cover>-ID-----------4----------5---------B---------\
For polygons these attributes are:
COLUMN--ITEM_NAME----------WIDTH-----OUTPUT-----TYPE---#_DECIMALS
1-------AREA-----------------8---------18---------F---------5
9-------PERIMETER------------8---------18---------F---------5
17------<cover>#-------------4----------5---------B---------\
21------<cover>-ID-----------4----------5---------B---------\
*************************************************************************
The database consists of five coverages which contain the folowing data:
COVERAGE---ENTITIES----DESCRIPTION
MV-GEO-----POLY/ARC----Geologic contacts and unit labels.
MV-FLT-----ARC---------Geologic structures (faults, fold axes, and caldera margins).
MV-ATT-----POINT/ARC---Bedding attitudes (point data and graphical representations).
MV-SYM-----POINT/ARC---Structure symbols such as bar-and-ball, strike-slip arrow, and anticline/syncline arrow symbols (point data and graphical representations).
MV-XS------POINT/ARC---Cross-section line on map (line and label points).
*************************************************************************
The individual attributes for each coverage are described as follows:
MV-GEO
>POLYGON ATTRIBUTES:
>UNIT#--Integer attribute for rock unit (see table below);
>UNIT--Character attribute for rock unit from text (see table below);
>SYMBOL--Integer attribute for polygon shade symbol (see table below).
>ARC ATTRIBUTES:
>CODE--Integer attribute for line type (see table below);
>SYMBOL--Integer attribute for line symbol (see table below);
>DESCRIPTION--Character attribute for line type description (see table below).
MV-FLT
>ARC ATTRIBUTES:
>CODE--Integer attribute for line type (see table below);
>SYMBOL--Integer attribute for line symbol (see table below);
>DESCRIPTION--Character attribute for line type description (see table below).
MV-ATT
>POINT ATTRIBUTES:
>CODE--Integer attribute for line type (see table below);
>DESCRIPTION--Character attribute for line type description (see table below);
>AZIMUTH--Integer attribute for bedding attitude strike azimuth (clockwise from north);
>DIP--Integer attribute for bedding attitude dip value.
>ARC ATTRIBUTES:
>CODE--Integer attribute for line type (see table below);
>SYMBOL--Integer attribute for line symbol (see table below);
>DESCRIPTION--Character attribute for line type description (see table below).
MV-SYM
>POINT ATTRIBUTES:
>CODE--Integer attribute for line type (see table below);
>DESCRIPTION--Character attribute for line type description (see table below);
>AZIMUTH--Integer attribute for orientation of symbol (clockwise from north);
>ARC ATTRIBUTES:
>CODE--Integer attribute for line type (see table below);
>SYMBOL--Integer attribute for line symbol (see table below);
>DESCRIPTION--Character attribute for line type description (see table below).
MV-XS
>POINT ATTRIBUTES:
>TEXT--Character attribute for text to be posted;
>ARC ATTRIBUTES:
>CODE--Integer attribute for line type (see table below);
>SYMBOL--Integer attribute for line symbol (see table below);
>DESCRIPTION--Character attribute for line type description (see table below).
*************************************************************************
UNIT#, UNIT, SYMBOL attribute values (rock unit symbols defined in Description of Map Units on printed map and/or the accompanying PDF text pamphlet):
1 , Ql , 40
2 , Qac , 1
3 , Qt , 4
4 , Qh , 2
5 , Qg , 5
7 , Qpy , 3
8 , Qpo , 8
9 , QTs , 10
10 , Ta , 12
11 , Taa , 131
12 , Tal , 46
13 , Tb , 79
14 , Tbc , 15
15 , Tbcd , 93
16 , Tbci , 32
17 , Tbct , 112
18 , Tbi , 124
19 , Tau , 102
20 , Tci , 56
21 , Tcg , 103
22 , Td , 125
23 , Tda , 130
24 , Tdk , 172
26 , Tdv , 91
27 , Tf , 104
28 , Tgf , 82
29 , Tlj , 110
30 , Tlm , 183
31 , Tlt , 114
32 , Tmb , 13
33 , Tmbl , 47
34 , Tmpn , 24
35 , Tmc , 41
36 , Tmd , 57
37 , Tmf , 34
38 , Tmg , 42
39 , Tmh , 41
40 , Tmi , 31
41 , Tmic , 29
42 , Tmj , 261
43 , Tmm , 14
45 , Tmpa , 43
46 , Tmpb , 44
47 , Tmpf , 67
48 , Tmpi , 55
49 , Tmpl , 66
50 , Tmps , 65
51 , Tmpu , 45
52 , Tmr , 51
54 , Tmv , 19
55 , To , 50
56 , Toi , 49
58 , Tpm , 81
59 , Tql , 160
60 , Trd , 71
61 , Trg , 68
62 , Trf , 69
63 , Tse , 11
64 , Tsp , 92
65 , Ttl , 115
66 , Tw , 72
67 , Twd , 113
68 , Tws , 159
69 , Tzt , 98
70 , Kpr , 221
71 , Ja , 151
72 , Jn , 145
73 , @c , 120
74 , @m , 162
75 , Pkt , 228
76 , P&pc , 167
77 , Mr , 152
78 , Dc , 100
79 , Dsi , 88
80 , Ds , 90
81 , SOle , 63
82 , Oej , 64
84 , Tnw , 30
85 , Qb , 219
89 , water , 216
(@ = Triassic symbol, & = Pennsylvanian symbol)
************************************************************************************************
CODE,SYMBOL,DESCRIPTION attribute values:
1 , 1 , "contact in bedrock"
2 , 1 , "bedrock-Quaternary contact"
3 , 1 , "contact in Quaternary"
5 , 50 , "known strike-slip fault"
6 , 52 , "approximately located strike-slip fault"
7 , 53 , "concealed strike-slip fault"
8 , 50 , "known normal fault"
9 , 52 , "approximately located normal fault"
10 , 53 , "concealed normal fault"
11 , 113 , "known thrust fault"
12 , 115 , "approximately located thrust fault"
13 , 116 , "concealed thrust fault"
16 , 119 , "known caldera margin"
17 , 121 , "approximately located caldera margin"
18 , 123 , "concealed caldera margin"
20 , 201 , "known anticline axis"
23 , 201 , "known syncline axis"
24 , 203 , "approximately located syncline axis"
25 , 244 , "concealed syncline axis"
40 , 50 , "cross-section line"
61 , 1 , "water boundary"
99 , 50 , "map area boundary"
201 , 50 , "bedding strike and dip symbol"
204 , 201 , "anticline symbol"
205 , 201 , "syncline symbol"
207 , 50 , "bar and ball symbol"
209 , 50 , "left-lateral strike-slip symbol"
219 , 50 , "overturned bedding strike and dip symbol"
362 , 50 , "horizontal bedding symbol"
*************************************************************************
Please refer to the ARC/INFO documentation for explanations of the standard attributes.

http://pubs.usgs.gov/imap/i-2645-a/i-2645-a_textonly.pdf