Christy Mathewson (MLB HOF) played Pro Football from 1898-1902. More than two-thirds of the athletes who played at the top level of both sports did so in the early years of the NFL during the 1920s and 1930s.
Marine Terraces Marine terraces are formed by coastal erosion and reflect the history of the rise and fall of sea level over time. However, marine terraces are only found along coastlines where the land is rising. In areas where the land is sinking they are submerged or buried by younger sediments.
Seaweed, which is a type of phytoplankton, is commonly found floating on the surface of the ocean. It is harvested by people for food and material for housing, baskets and ropes. Seagrasses are rooted marine plants that live on the ocean floor. These flowering plants provide habitat for small fish and other marine life. Types of seagrasses include shoal grass, manatee grass and turtle grass. Red algae live in warm tropical water, while coralline algae grow on rocks. The ocean also has an abundance of kelp beds that grow in cold temperate regions.