👉 The term "geosynclinal" refers to a type of fluid in Earth's mantle that is composed primarily of silicon dioxide (SiO2) and has a high degree of mobility. This type of fluid is found at the surface of the Earth, particularly near the Earth's core, and is responsible for the movement of tectonic plates around the globe. The geosynclinal fluid is also known as the mantle fluid or the mantle fluid system because it is composed primarily of
