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Mon, 15 Apr 2024 21:01:29 +0200
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James Green
archeaids@mastodon.online
Left) Opal-CT lithic material from a thin (10-15 cm) ledge of rock uncovered at Fort Johnson, Vernon Parish, LA. It is possibly Fleming opal. Right) Banded Alibates flint from the Texas Panhandle.
#Archaeology
#geology
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Left) 2 views of a translucent medium brown rock with white to beige streaks & mottles. One view has a backlight to show translucency. Right) A flake with very dark red bands separated unevenly with white to pale lavender bands. One view is backlit to show translucency.
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5 comments
Mon, 15 Apr 2024 22:52:37 +0200
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Aviva Gary
Aviva_Gary@noc.social
@archeaids
cool
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Mon, 15 Apr 2024 23:36:55 +0200
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_jayrope
jrp@hub.kliklak.net
@
James Green
when would it be called flintstone?
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Mon, 15 Apr 2024 23:42:19 +0200
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James Green
archeaids@mastodon.online
@jrp
Geologically, flint is highly siliceous dark gray or black chert nodules derived from chalky limestone.
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_jayrope
Mon, 15 Apr 2024 23:45:48 +0200
last edited: Mon, 15 Apr 2024 23:46:18 +0200
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_jayrope
jrp@hub.kliklak.net
@
James Green
excellent, thank you! I would have thought there is a similarity regarding the glassiness of opal and flintstone. Is that silica in both cases?
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Mon, 15 Apr 2024 23:46:52 +0200
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James Green
archeaids@mastodon.online
@jrp
let me reply later.
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_jayrope
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