Mason County, Washington (data.census.gov)Mason County, Washington has 959.6 square miles of land area and is the 29th largest county in Washington by total area. Mason County, Washington is bordered by Grays Harbor County, Washington, Thurston County, Washington, Kitsap County, Washington, Jefferson County, Washington, and Pierce County, Washington.
Ordovician (Wikipedia)The Ordovician (/ɔːrdəˈvɪʃi.ən, -doʊ-, -ˈvɪʃən/ or-də-VISH-ee-ən, -doh-, -VISH-ən) is a geologic period and system, the second of six periods of the Paleozoic Era. The Ordovician spans 41.6 million years from the end of the Cambrian Period 485.4 million years ago (Mya) to the start of the Silurian Period 443.8 Mya.