Help|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

US Route 6 Willimantic Bypass expressway road cuts, Coventry, Tolland Co., Connecticut, USA

This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84): 41° 43' 24'' North , 72° 16' 9'' West
Latitude & Longitude (decimal): 41.7233333333, -72.2691666667

Completed in the early 1980s, the U.S. Route 6 Willimantic Bypass expressway is casually referred to as being in Willimantic, the nearby city. Actually it is not in the city's incorporated boundary and instead is situated in four towns - from west to east: Columbia, Coventry, Windham (which includes the city of Willimantic) and Mansfield. At the time of construction, it was intended to be part of Interstate I-84, but those plans were eventually abandoned. Because of this, old or incorrect labels may refer to the locality as I-84 or Route 84. Before the bypass, U.S. Route 6 used to pass through downtown Willimantic on a stretch of road that is now part of state Route 66.

The expressway begins in the town of Columbia, at a 4-way at-grade intersection with State Route 66. From here the expressway heads northeast and immediately crosses into the town of Coventry where the eastbound and westbound sides of the expressway split, with a hill in between them. The Coventry section contains by far the major road cuts on the expressway and produced specimens found in old collections. The road cuts expose gneiss of the Ordovician Tatnic Hill Formation (part of the Putnam-Nashoba Terrane), which here and in other places around the state can host sillimanite crystals in quartz-rich segregations. Fractures in the gneiss host drusy epidote, quartz, prehnite and zeolites. The locality coordinates are for this portion of the expressway.

The expressway then crosses the Willimantic River and enters the town of Windham. At the interchange with State Route 32 there are additional road cuts exposing gneiss of the Waterford Group (part of the Avalonian Terrane) and a small pegmatite dike, mostly on the ramps rather than on the highway, which include part of a small quarry. But these cuts are minor compared to those in Coventry.

After the Rt 32 interchange, the expressway enters the town of Mansfield. There are no bedrock road cuts in this section. After U. S. Route 6 Willimantic Bypass crosses the Natchaug River it once again enters Windham. 0.5 miles (0.80 km) after entering Windham, the U.S. Route 6 Willimantic Bypass ends at an interchange with State Route 66 and U. S. Route 6. There are no bedrock road cuts in this final section.

Mineral List

6 valid minerals.

The above list contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
Mineral and/or Locality is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © and the Hudson Institute of Mineralogy 1993-2017, except where stated. relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: July 26, 2017 11:41:34 Page generated: May 4, 2017 15:44:59
Go to top of page