Shavelson, R.; Young, D.; Ayala,
Shavelson, R.; Young, D.; Ayala, C.; Brandon, P. Furtak, E.; Ruiz-Primo, M.; Tomita, M. & Yin, Y. (2008). "On the impact of curriculum-embedded formative assessment on learning: A collaboration between curriculum as…
Paleozoic Time Period. Two Internet Sources, Author.
Six major continents were present by the beginning of the Paleozoic Era, as the supercontinent had started to break apart during the latest Proterozoic period. Each of these continents can be separated into two principal constituents: a craton and one or several mobile belts. In contrast to the geological history of the Mesozoic and Cenozoic periods, there is lesser information concerning the Paleozoic era because the development of Pangaea led to the destruction of magnetic anomaly patterns that would normally be preserved in ocean crust. Experts thus focused on other concepts in trying to find out more regarding the period's geological history, such as how plants and animals were distributed and other structural relationships.