Chapter V

Valley Spring Gneiss: 59
Val Verde County: 45, 74, 75
Van Horn area: 42, 52, 53, 58, 59, 60, 75, 76, 79, 85, 87, 90
Van Horn Mountains: 45, 55, 76, 79, 95
Van Zandt County: 66
verde antique: 88
vesicles: 45
vitrophyre: 40, 77
volcanic ash: 41, 97
volcanic igneous rocks, definition of: 9
volcanoes: 9, 97, 98

W
Waco: 88
wad: 73, 74
Walker County: 52
Ward County: 66
Washington County: 78, 84
weathering: 11
Webb County: 11, 84
Weches strata: 70
Wharton County: 91
white mica (_see_ muscovite)
Wilbarger County: 98
Willacy County: 66
Williamson County: 20, 60, 69, 70, 88
Willow City: 94
wood opal: 78
wood, petrified: 20, 52, 78, 84
Wylie Mountains: 95

Y
yellow copper ore: 53
Yoakum County: 66
Young County: 58
yttrium: 80

Z
Zapata County: 83, 84
Zavala County: 86
zirconium: 80

Transcriber’s Notes

--Retained publication information from the printed edition: this eBook
is public-domain in the country of publication.

--Corrected a few palpable typos.

--Included a transcription of the text within some images.

--In the text versions only, text in italics is delimited by
_underscores_.

--Added a label to one figure (to match the Table of Illustrations).

End of Project Gutenberg's Texas Rocks and Minerals, by Roselle M. Girard