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McLay Avenue, East Haven, New Haven Co., Connecticut, USA
Detailed Mineral List:
| Calcite | ||
| Formula: | CaCO3 | |
| Habit: | scalenohedral | |
| Colour: | white to orange | |
| Description: | Micro-crystals in small pockets. | |
| Reference: | Vener, Herm. (1987): Report on the Road Cut [Mclay Avenue] off Grannis St [Laurel Street] Just Past the Cinque Quarry. Triassic Valley Bulletin. | |
| Goethite | ||
| Formula: | α-Fe3+O(OH) | |
| Habit: | acicular | |
| Colour: | golden-brown | |
| Description: | Radiating sprays of acicular, translucent, micro crystals penetrating smoky quartz crystals. | |
| Reference: | Vener, Herm. (1987): Report on the Road Cut [Mclay Avenue] off Grannis St [Laurel Street] Just Past the Cinque Quarry. Triassic Valley Bulletin. | |
| Hematite | ||
| Formula: | Fe2O3 | |
| Colour: | dark red | |
| Description: | Coatings and small blebs on micro crystals of calcite and quartz. | |
| Reference: | Vener, Herm. (1987): Report on the Road Cut [Mclay Avenue] off Grannis St [Laurel Street] Just Past the Cinque Quarry. Triassic Valley Bulletin. | |
| Quartz | ||
| Formula: | SiO2 | |
| Habit: | bipyramidal with very short or no prism. | |
| Colour: | colorless | |
| Description: | Micro-crystals in small pockets, typically penetrated by acicular goethite. | |
| Reference: | Vener, Herm. (1987): Report on the Road Cut [Mclay Avenue] off Grannis St [Laurel Street] Just Past the Cinque Quarry. Triassic Valley Bulletin. | |
| Quartz var: Amethyst | ||
| Formula: | SiO2 | |
| Colour: | purple | |
| Description: | Micro-crystals in small pockets. | |
| Reference: | Vener, Herm. (1987): Report on the Road Cut [Mclay Avenue] off Grannis St [Laurel Street] Just Past the Cinque Quarry. Triassic Valley Bulletin. | |
| Quartz var: Jasper | ||
| Habit: | massive | |
| Colour: | red | |
| Reference: | Vener, Herm. (1987): Report on the Road Cut [Mclay Avenue] off Grannis St [Laurel Street] Just Past the Cinque Quarry. Triassic Valley Bulletin. | |
| Quartz var: Smoky Quartz | ||
| Formula: | SiO2 | |
| Habit: | bipyramidal with very short or no prism. | |
| Colour: | light brown to black | |
| Description: | Micro-crystals in small pockets, typically penetrated by acicular goethite. | |
| Reference: | Vener, Herm. (1987): Report on the Road Cut [Mclay Avenue] off Grannis St [Laurel Street] Just Past the Cinque Quarry. Triassic Valley Bulletin. | |
7 entries listed. 4 valid minerals.
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