Geology and Resource Assessment of the Venezuelan ... - USGS

Xgu Granitic silicic to intermediate intrusive rocks (E Prot)
Xlc Los Caribes Fm arkose, polymict congl, phyllite (E Prot)
Xm1 Meta-mafic to intermediate flow and pyroclastic rx (E Prot)
Xm2 Mafic to intermediate metalava and metatuff (E Proterozoic
Xma Maracapra Fm red beds, felsic volcanics (E Proterozoic)
Xmo Moriche Fm metasedimentary conglomerates (E Prot)
Xmp Intrusive rx of San Carlos metamorphic-plut terrane (E Prot
Xmu Greenstone belt rocks, undivided (Early Proterozoic)
Xpr Pre-Roraima Gp sedimentary rx clay-rich sandstone (E Prot)
Xs1 Schist, phyllite, metatuffs, and metavolcanic rx (E Prot)
Xs2 Muscovite schist and phyllite, eugeosynclinal terr (E Prot)
Xsm Seds and metaseds of uncertain affinity qtz arenite (E Prot
Xsp Supamo Complex sodic granitic rx, paragneiss, etc. (E Prot)
Xu1 Metaperidotite, metapyroxenite, serp & talc schist (E Prot)
Xu2 Ultramafic rx metaperidotite, metapyroxenite, etc. (E Prot)
Xui Ultramafic intrusive rx in La Flor-Carapo area (E Prot)
Xyf Yuruari Fm (Pastora Sg) felsic metatuff (E Prot)
Xys Yuruari Fm Pastora Sg qtz muscovite schist, phyllite E Prot
Ylg Late granite intrusive in, and doming Roraima seds (M Prot)
Yp Parguaza granite, massive, porphryitic & biotite (M Prot)
YXac Alkaline intrusive complexes (Middle to Early Proterozoic)
YXr Roraima Group (undivided) qtz arenite, arkose M &/or E Prot
YXra Auyantepuy Fm (Roraima Gp) quartz arenite, arkose M, E Prot
YXrc Canaima Fm (Roraima Gp) qtz arenite, arkose, etc. M, E Prot
YXrg Guaiquinima Fm (Roraima Gp) qtz arenite, arkose M, E Prot
GEOLOGY ARC TYPES:
The VZGE.AAT items are:
COLUMN ITEM NAME WIDTH OUTPUT TYPE
1 FNODE# 4 5 B
5 TNODE# 4 5 B
9 LPOLY# 4 5 B
13 RPOLY# 4 5 B
17 LENGTH 4 12 F
21 VZGE# 4 5 B
25 VZGE-ID 4 5 B
29 CODE 3 3 I
32 P1 3 3 I
35 P2 3 3 I
CODE DESC
1 international boundary
2 surface water body
30 geological contact
32 geological contact hidden
FAULT ARCS:
The VZFT.AAT attribute table contains: