#riebeckite — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #riebeckite, aggregated by home.social.
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#Mafic enclave (?) in Rattlesnake Hill #Granite, #Massachusetts
This Devonian granite intrudes #Proterozoic Dedham Granite south of #Boston. It is younger than the nearby Blue Hill Granite Porphyry. The triangular area is rich in large crystals, possibly hornblende. The blue crystals at lower left may be #riebeckite, another amphibole. Riebeckite gives Quincy Granite and the #BlueHills Range their distinctive color. All on Avalon terrane, out of Gondwana. Acadian Orogeny was Devonian. My #photo
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#Mafic enclave (?) in Rattlesnake Hill #Granite, #Massachusetts
This Devonian granite intrudes #Proterozoic Dedham Granite south of #Boston. It is younger than the nearby Blue Hill Granite Porphyry. The triangular area is rich in large crystals, possibly hornblende. The blue crystals at lower left may be #riebeckite, another amphibole. Riebeckite gives Quincy Granite and the #BlueHills Range their distinctive color. All on Avalon terrane, out of Gondwana. Acadian Orogeny was Devonian. My #photo
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#Mafic enclave (?) in Rattlesnake Hill #Granite, #Massachusetts
This Devonian granite intrudes #Proterozoic Dedham Granite south of #Boston. It is younger than the nearby Blue Hill Granite Porphyry. The triangular area is rich in large crystals, possibly hornblende. The blue crystals at lower left may be #riebeckite, another amphibole. Riebeckite gives Quincy Granite and the #BlueHills Range their distinctive color. All on Avalon terrane, out of Gondwana. Acadian Orogeny was Devonian. My #photo
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#Mafic enclave (?) in Rattlesnake Hill #Granite, #Massachusetts
This Devonian granite intrudes #Proterozoic Dedham Granite south of #Boston. It is younger than the nearby Blue Hill Granite Porphyry. The triangular area is rich in large crystals, possibly hornblende. The blue crystals at lower left may be #riebeckite, another amphibole. Riebeckite gives Quincy Granite and the #BlueHills Range their distinctive color. All on Avalon terrane, out of Gondwana. Acadian Orogeny was Devonian. My #photo
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#Mafic enclave (?) in Rattlesnake Hill #Granite, #Massachusetts
This Devonian granite intrudes #Proterozoic Dedham Granite south of #Boston. It is younger than the nearby Blue Hill Granite Porphyry. The triangular area is rich in large crystals, possibly hornblende. The blue crystals at lower left may be #riebeckite, another amphibole. Riebeckite gives Quincy Granite and the #BlueHills Range their distinctive color. All on Avalon terrane, out of Gondwana. Acadian Orogeny was Devonian. My #photo