The Puget Group is a geologic group in Washington (state). It preserves fossils dating back to the Paleogene period. ¶ Two key formations include the Renton Formation and the Tukwila Formation.
Tau (Wikipedia) Tau /ˈtɔː, ˈtaʊ/ (uppercase Τ, lowercase τ, or τ; Greek: ταυ [taf]) is the 19th letter of the Greek alphabet, representing the voiceless dental or alveolar plosive IPA: [t]. In the system of Greek numerals, it has a value of 300.