Collection of Peter Robinson Blackline 24K Geologic Maps

• Bedrock Geologic Contacts for Ashby 7.5 Minute Quadrangle
• Bedrock Geologic Contacts for Athol 7.5 Minute Quadrangle
• Bedrock Geologic Contacts for Barre 7.5 Minute Quadrangle
• Bedrock Geologic Contacts for Belchertown 7.5 Minute Quadrangle
• Bedrock Geologic Contacts for East Brookfield 7.5 Minute Quadrangle
• Bedrock Geologic Contacts for Easthampton 7.5 Minute Quadrangle
• Bedrock Geologic Contacts for Fitchburg 7.5 Minute Quadrangle
• Bedrock Geologic Contacts for Gardner 7.5 Minute Quadrangle
• Bedrock Geologic Contacts for Greenfield 7.5 Minute Quadrangle
• Bedrock Geologic Contacts for Hampden 7.5 Minute Quadrangle
• ... More ...

Categories

• Data

Theme

• ndc_collection

Types

• Map Service
• OGC WFS Layer
• OGC WMS Layer
• OGC WMS Service

From 1960 through the decade of the 1970's Professor Peter Robinson studied and mapped the geology of central Massachusetts with countless students as part of his Advanced Mapping classes and as the chief advisor on many Master's theses and doctoral dissertations. This data was ultimately compiled by Professor Robinson in the early 1980's as part of his task as chief compiler of the geology of central Massachusetts during the preparation of the 1983, 1:250,000 scale bedrock geologic map of Massachusetts. Dr. Robinson took all this work and compiled in on clean 1:24,000 scale topographic maps using a black felt tip pen. The maps languished in drawers until 2016. For this project, the maps were scanned on an Ideal Contex FSC 5010 color scanner then georeferenced in ArcGIS version 10.3.1. Maps were archived as tiffs. All contacts were located in the field by geologists during mapping. Accuracy of contacts are within 50 meters. Contacts portrayed represent the understanding of the geology and the location of geologic contacts at the time the field work was conducted. Unit labels and details may have changed since the data were compiled in 1983.