- Brandstedt Slough runs along the northwest side of Erickson Island, connecting Steamboat Slough in the north with Boom Slough in the south. The slough separates Erickson Island from Fir Island. The entire slough is located in the Skagit Bay Estuary Wildlife Area Unit, which also covers Erickson Island and much of the Skagit River Delta.
- Mesoarchean (Wikipedia)
The Mesoarchean (/ˌmiːzoʊ.ɑːrˈkiːən, ˌmɛzoʊ-/ MEE-zoh-ar-KEE-ən, MEZ-oh-, also spelled Mesoarchaean) is a geologic era in the Archean Eon, spanning 3,200 to 2,800 million years ago, which contains the first evidence of modern-style plate subduction and expansion of microbial life. The era is defined chronometrically and is not referenced to a specific level in a rock section on Earth.