EVERYDAY SCIENCE

Detailed explanation-1: -The most significant progressive development of this period was that of the first true terrestrial ecosystem. The first fossil records of vascular plants, that is, land plants with tissue was of those which carries food, occurred during the Silurian period.

Detailed explanation-2: -Possibly the most remarkable biological event during the Silurian was the evolution and diversification of fish. Not only does this time period mark the wide and rapid spread of jawless fish, but also the appearances of both the first known freshwater fish and the first fish with jaws.

Detailed explanation-3: -During the Silurian period Earth’s continents joined together, closing the Iapetus Ocean and forming two supercontinents: Laurasia in the north, and Gondwanaland to the south. The South American and southern African Gondwana plates moved slowly toward and then over the South Pole.

Detailed explanation-4: -The Silurian Period. The Silurian (443.7 to 416.0 million years ago)* was a time when the Earth underwent considerable changes that had important repercussions for the environment and life within it.

Detailed explanation-5: -The Silurian Period (443.1–419.0 Ma) was a time of general convergence of continental plates, strong fluctuations in global sea level, and the early stages of colonization of land.