Vermont-USGS Cooperative Geologic Mapping Project A New State Bedrock Geologic Map of Vermont Proposed Layout of the New State Map List of Published Quadrangle-Scale Maps Index Map of Published and In-Progress Maps (GIF image) Index Map of Published Digital Maps (PDF format) Arc/Info and ArcView symbols Frequently Asked Questions Recent Papers & Maps from the Vermont Project Ratcliffe, N.M., and Armstrong, T.R., 2001, Bedrock geologic map of the Saxtons River 7.5´ x 15´ quadrangle, Windham and Windsor Counties, Vermont: U.S. Geological Survey Miscellaneous Investigations Series Map I-2636, scale 1:24,000. Walsh, G.J., and Falta, C.K., 2001, Bedrock geologic map of the Rochester quadrangle, Rutland, Windsor, and Addison Counties, Vermont: U.S. Geological Survey Miscellaneous Investigations Series Map I-2626, scale 1:24,000. Ratcliffe, N.M., 2000, Bedrock geologic map of the Chester quadrangle, Windsor County, Vermont: U.S. Geological Survey Miscellaneous Investigations Series Map I-2598, scale 1:24,000. Ratcliffe, N.M., 2000, Bedrock geologic map of the Cavendish quadrangle, Windsor County, Vermont: U.S. Geological Survey Geologic Quadrangle Map GQ-1773, scale 1:24,000. Walsh, G.J. and Aleinikoff, J.N., 1999, U-Pb zircon age of metafelsite from the Pinney Hollow Formation: Implications for the development of the Vermont Appalachians: American Journal of Science, v. 299, p. 157-170. Ratcliffe, N.M., Harris, A.G., and Walsh, G.J., 1999, Tectonic and regional metamorphic implications of the discovery of Middle Ordovician conodonts in cover rocks east of the Green Mountain massif, Vermont: Canadian Journal of Earth Sciences, v. 36, no. 3, p. 371-382. Ratcliffe, N.M., and Armstrong, T.R., 1999, Bedrock geologic map of the West Dover and Jacksonville quadrangles, Windham County, Vermont: U.S. Geological Survey Miscellaneous Investigations Series Map I-2552, scale 1:24,000. Work is underway to publish a 1:100,000-scale bedrock geologic map of Vermont. The new map will be published jointly by the State of Vermont Agency of Natural Resources (VTANR), Vermont Geological Survey (VGS) and the U.S. Geological Survey (USGS) as the result of a cooperative Federal and State project in the National Cooperative Geologic Mapping Program (NCGMP) of the USGS. The new State map will be published in several sheets, and will stand ten feet tall (fig. 1). Printing is scheduled for the early part of the new millennium. A digital version of the 1:100,000 compilation will be published in GIS format. Recent geologic mapping, conducted over the past 15 years by the USGS, VGS, and University cooperators at scales of 1:24,000 or larger, will cover approximately 65 percent of the State. Since the inception of the Vermont-USGS Cooperative Geologic Mapping Project the USGS has published a number of 7.5 minute quadrangle-scale (1:24,000) bedrock geologic maps in Vermont. Figure 2 shows an index map and list of the published quadrangles. The index map also shows quadrangles where current work is in progress. An integral part of the project has been the development of a digital bedrock geologic map database of recently completed mapping. The initial development of the database established the ground rules and procedures for development of a statewide database that is compatible with Vermont's existing GIS structure. The database development and compilation of geologic information is a cooperative effort conducted by the USGS, VGS, and the Office of Information Management Services at the Vermont Agency of Natural Resources. The database contains information on the distribution and location of bedrock geologic units, outcrops, faults, foliations, cleavages, joints, and mines and quarries. To date, the USGS and the VGS have published more than 30 7.5 minute quadrangles as digital bedrock geologic maps in an Open-File Report format (fig. 3). The database is maintained by the Vermont Geological Survey. The reports are available as colored paper maps and Arc/Info digital files. Contact the Vermont Geological Survey (VGS) for more information. Digital bedrock geologic map of the Rochester quadrangle, Vermont by Walsh and Falta (1996) USGS Open-File Report 96-33 For additional information on the Vermont-USGS Cooperative Geologic Mapping Project contact: Nicholas M. Ratcliffe U.S. Geological Survey  926A National Center Reston, Virginia  20192 nratclif@usgs.gov         OR Gregory J. Walsh U.S. Geological Survey  P.O. Box 628 Montpelier, Vermont 05601 gwalsh@usgs.gov For information on other programs of geologic mapping in the Eastern Earth Surface Processes Team at the USGS contact the Chief Scientist at the address below: USGS - Eastern Earth Surface Processes Team   Contact Chief Scientist (ERGMT), U.S. Geological Survey, 926A National Center, Reston, VA 20192 jquick@usgs.gov  Links to other USGS Information Servers USGS Geologic Information about Vermont USGS Home Page USGS Geologic Information USGS Help Page  This page is at URL: http://geology.er.usgs.gov/eespteam/vtp/vermont.html Maintained by: Gregory J. Walsh, gwalsh@usgs.gov Last Modified: 18 February 2003