Locality type: | Neighborhood |
Classification |
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Species: | Anorthite var: Labradorite |
Formula: | (Ca,Na)[Al(Al,Si)Si2O8] |
Confirmation |
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Validity: | Believed Valid |
Data |
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Mineral Data: | Click here to view Labradorite data |
Locality Data: | Click here to view Porter Square, Cambridge, Middlesex County, Massachusetts, USA |
Data Identifiers |
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Mindat Occurrence Record ID: | 713394 |
Long-form Identifier: | 1:3:713394:7 |
GUID (UUID V4): | 55a14f3a-094f-4cd6-8031-c7c6be74f9af |
Nearest other occurrences of Labradorite |
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50.9km (31.6 miles) | ⓘIron Mine Hill quarry, Cumberland, Providence County, Rhode Island, USA |
81.7km (50.7 miles) | ⓘMount Pawtuckaway, Nottingham, Rockingham County, New Hampshire, USA |
96.5km (60.0 miles) | ⓘCape Neddick, York, York County, Maine, USA |
References |
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Reference Search (possible matching items) |
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| | Journal (article/letter/editorial) | 40Ar/39Ar age for a camptonite dyke in Cambridge, Massachusetts, USA Martin E. Ross Department of Earth and...Sciences, Northeastern University, Boston, Massachusetts 02115, USA Date received: 28 November...excavation of a subway station at Porter Square in Cambridge, Massachusetts, was sampled for petrological...d’excavation d’une station de métro à Porter Square, à Cambridge, au Massachusetts, un dyke de campronite d’une...identified (Ross 1990) in Avalonia in eastern Massachusetts (Fig. 1). As described by Ross (1981, 1982, | | | Report (issue) | ..........................3 Subway Tunnel in Cambridge and Somerville (Red Line Extension).............reveals the diabase is mainly plagioclase laths (labradorite to oligoclase), pyroxene (diopside and augite)...Side of Charles River Syncline Bedrock in the Cambridge-Somerville area contains various small folds superimposed...overturned to the north, has beer arched into the Porter Square anticline which is cut by diked faults. Additional...Additional mapping in the Harvard Square area indicates that argillite in the City Tunnel Extension also | | | Journal (issue) | carbide abrasive in a wet Phonollte Novacullte Labradorite • Adobe "Glauconite Sand Biotite Dolomite Tremollte...Included with catalogII • ■OST ITEIS POSTPAID TO USA Df1TIIATIOIS I ALPHA FACETING SUPPLY, INC. • 100%...60 no e 12 .081 5.20 14 .064 4.15 16 .051 3.40 SQUARE WIRE 10 Ft. $1 .10 • 22 • 20 1.40 1.95 • 18 3 ... . . . . . . . . round 20. . . . . . . . . . . square 14 . . . . . . . . . . . round 1 1 double ½ round...MIDWESTERN STATES Ohio Otto E. Ehrhart-Paulding County Hi.storical Society - City Hall, North Main Street |
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