Definitions from Wiktionary (Portlandian)
▸ noun: (archaic, geology) The Tithonian stage or age, now considered strata about 150 million years old.
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▸ noun: (archaic, geology) The Tithonian stage or age, now considered strata about 150 million years old.
Similar:
Tithonian,
Titonian,
tithonic,
Tarantian,
tertiary,
Oxfordian,
Actonian,
Tournaisian,
Ordovician,
Thanetian,
more...
Opposite:
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