| Classification |
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| Species: | 'Heulandite Subgroup' (not an IMA approved species) |
| Formula: | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| Confirmation |
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|
| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Heulandite Subgroup data |
| Locality Data: | Click here to view Ridgefield, Fairfield County, Connecticut, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 131005 |
| Long-form Identifier: | 1:3:131005:4 |
| GUID (UUID V4): | fbe9abe5-8c18-438a-9140-3bf808ecfd96 |
| Nearest other occurrences of Heulandite Subgroup |
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| 5.2km (3.2 miles) | ⓘFillow Quarry (Branchville Quarry; Branchville Mica Mine; Smith Mine), Branchville, Redding (Reading), Fairfield County, Connecticut, USA |
| 6.8km (4.2 miles) | ⓘState Route 57 zeolite occurrence (Georgetown locality; Connerie's store), Redding (Reading), Fairfield County, Connecticut, USA |
| 14.9km (9.3 miles) | ⓘNorth Street mall, Danbury, Fairfield County, Connecticut, USA |
| 18.0km (11.2 miles) | ⓘInterstate 84 road cuts, Town of Southeast, Putnam County, New York, USA |
| 18.9km (11.7 miles) | ⓘTilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA |
| 22.4km (13.9 miles) | ⓘOld Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA |
| 22.5km (14.0 miles) | ⓘNew England Materials quarry, Monroe, Fairfield County, Connecticut, USA |
| 25.6km (15.9 miles) | ⓘExit 24 Interstate highway 95, Fairfield, Fairfield County, Connecticut, USA |
| 33.1km (20.6 miles) | ⓘNew York City Aquaduct openings, Ossining (Sing Sing), Westchester County, New York, USA |
| 35.0km (21.7 miles) | ⓘO & G Southbury Quarry (Silliman Quarry; O & G No. 2 Quarry), Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA |
| References |
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