- Foliation in geology refers to repetitive layering in metamorphic rocks. Each layer can be as thin as a sheet of paper, or over a meter in thickness. The word comes from the Latin folium, meaning “leaf”, and refers to the sheet-like planar structure. It is caused by shearing forces (pressures pushing different sections of the rock in different directions), or differential pressure (higher pressure from one direction than in others). The layers form parallel to the direction of the shear, or perpendicular to the direction of higher pressure. Nonfoliated metamorphic rocks are typically formed in the absence of significant differential pressure or shear. Foliation is common in rocks affected by the regional metamorphic compression typical of areas of mountain belt formation (orogenic belts).
- Washington State Route 529 (Wikipedia)
State Route 529 (SR 529, officially the Yellow Ribbon Highway) is a Washington state highway that connects the cities of Everett and Marysville. The 7.88-mile-long (12.68 km) roadway extends north from an interchange with Interstate 5 (I-5), numbered exit 193, past the western terminus of U.S. Route 2 (US 2), its spur route, Downtown Everett and Naval Station Everett to cross the Snohomish River onto Smith Island. After crossing the Steamboat Slough, the road encounters an interchange with I-5, numbered exit 198, before crossing the Ebey Slough and entering Marysville. In Marysville, SR 529 ends at SR 528. Before being realigned in 1991, SR 529 started at exit 192 of I-5 and traveled north as Broadway through Downtown Everett to Marysville.