- Patricia Lynn Murray (née Johns; born October 11, 1950) is an American politician who has served as president pro tempore of the United States Senate since 2023 and the senior United States Senator from Washington since 1993. A member of the Democratic Party, Murray served in the Washington State Senate from 1989 to 1993. She was Washington’s first female U.S. senator and is the first woman in American history to hold the position of president pro tempore. Murray is also the youngest senator to occupy the office of president pro tempore in more than five decades. As president pro tempore, Murray is third in the line of succession to the U.S. presidency.
- Plucking (Wikipedia)
Plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the weathering and erosion of pieces of bedrock, especially large “joint blocks”. This occurs in a type of glacier called a “valley glacier”. As a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock. The freezing and thawing action of the ice enlarges, widens, or causes further cracks in the bedrock as it changes volume across the ice/water phase transition (a form of hydraulic wedging), gradually loosening the rock between the joints. This produces large pieces of rock called joint blocks. Eventually these joint blocks come loose and become trapped in the glacier.