But the arrival of the dockless bike-share model was received mostly with praise and excitement in a city that has embraced biking as a mode of transportation. Some biking aficionados said they hope the companies will indeed bring more bikes to underserved communities of the District, including the Northeast and Southeast quadrants.
It sounds super-gross but please try to imagine it: Red muscles, pink muscles, and white muscles. The red muscles are red because they contain lots of myoglobin: a protein that binds iron and oxygen. Your blood has a similar protein called hemoglobin which binds iron and oxygen.
The red color of some of the outcrops of the Aztec Sandstone is due to presence of iron oxide or hematite. Exposure to the elements caused iron minerals to oxidize or ârust,â resulting in red, orange, and brown-colored rocks. Areas where the rock is buff in color may be places where the iron has been leached out by subsurface water, or where the iron oxide was never deposited.