The Geology of the Limestone of Isle La Motte and South Hero Island, Vermont

This resource is available as a downloadable file, ESRI Service, and as a Web Feature service. Resource includes a Bedrock map, Cross Section, Cross Section, Fault block map, and a text on the Bedrock geology of Isle La Motte and South Hero Island, Vermont. Abstract: Detailed study of the two islands reveals many similarities in structure, stratigraphy and paleontology. Both areas have been cut into fault blocks by "normal" and "thrust" faulting. Isle La Motte has been cut into two blocks, while South Hero Island has been cut into several. The amount and direction of dip of the larger faults is indeterminate, but most are considered normal in accordance with the faults of the Champlain Valley as a whole. Evidence is presented to establish the presence of hitherto unrecognized thrust faulting in the limestone. South Hero Island displays a western belt of simple folding separated by a thrust fault from an eastern belt of more complex folding, the origin of which is attributed to northwesterly moving thrusting forces. The same structural setup is noted in the overlying shaly beds, but faulting is generally indeterminate in the shale.

Data and Resources

Metadata Source

Additional Info

Field Value
Citation Date 1957-01-01T12:00:00

Harvest Information

Original ID ba2f0b9d21f71acfe10609f76e0fd8e5
Index Date 2017-08-30T15:58:50Z
Original Format ISO-USGIN
Original Version 1.2


Name Robert B. Erwin
Position missing
Organization Vermont Geological Survey

Geographic Extent

North Bound 44.917
South Bound 44.583
East Bound -73.25
West Bound -73.375