Ground-water resources of north-central Connecticut

Abstract

Location and general features of the area...______________________ 3 Purpose of the investigation____________________________________ 4 Methods of study and scope of investigation ______________________ 5 Previous groundwater and geologic investigations _________________ 6 Acknowledgments. __________________________________________ 8 Well-numbering system ________________________________________ 10 Topography ______________________________________________________ Streams-_______________________________________________________ 12 Climate-_________________________________________________________ 14 Physiographic development_________________________________________ 16 Pre-Pleistocene history.________________________________________ 17 Pleistocene glaciation__________________________________________ 18 Post-Pleistocene history ______________________________________ Geology.__ _ ____________________________________________________ Descriptions and water-bearing properties of the geologic formations. Consolidated rocks_______________________________________ 22 Crystalline rocks of pre-Triassic age____________________ General character and extent______________________ Water-bearing properties ___________________________ Yields of wells. __ ______________________ Sedimentary rocks of Triassic age______________________ General character and extent___________________ Water-bearing properties___-___-__-___-__-______ 31 Factors causing areal variation in yield_____________ Igneous rocks of Triassic age__________________________ General character and extent_____________________ Water-bearing properties.________________________ Well construction________________________________ Unconsolidated deposits____________________________________ Ground-moraine deposits_________________________-___-_ General character and extent______________________ Water-bearing properties____-____________-_______ Ice-contact deposits__________________________________ General character and extent___________________ Water-bearing properties____-_-____-__-__-_-46 Ice-contact deposits in Glastonbury, Manchester, and Vernon_________________________________________ Ice-contact deposits in South Windsor and East Wind-sor_____________________________ Ice-contact deposits in Ellington and Somers______-49 in IV CONTENTS Geology Continued Descriptions and water-bearing properties of the geologic formations Continued Unconsolidated deposits Continued Page Outwash-plain, valley-train, and undifferentiated outwash deposits..- .-______________________________________ General character and extent______________________ Water-bearing properties___________________________ Buried outwash deposits in the preglacial channel of the Connecticut River_____-_-_-_-_-_-_-_-_-_-___-___-General character and extent______________________ Water-bearing properties___________________________ Glaciolacustrine and associated delta deposits_____________ General character and extent of the glaciolacustrine deposits______________________________________ Water-bearing properties of the glac...