When sedimentary rock go to the bottom of a seafloor it sticks together over time and turns into metamorphic rock. Then metamorphic rock melts and when it cools down it turns into igneous rock. This process happen over and over and its called rock cycle.
An alluvial fan is a triangle-shaped deposit of gravel, sand, and even smaller pieces of sediment, such as silt. This sediment is called alluvium. Alluvial fans are usually created as flowing water interacts with mountains, hills, or the steep walls of canyons.
Also, Marine sediment, any deposit of insoluble material, primarily rock and soil particles, transported from land areas to the ocean by wind, ice, and rivers, as well as the remains of marine organisms, products of submarine volcanism, chemical precipitates from seawater, and materials from outer space.
The questions about language and religion depend a lot on where the 100 people are (assuming all of them are in the same place). In terms of money, 25 people would be really rich, 50 people would be middle income, and 25 people would be really poor( I'd probably be a middle income person). The specific amount of money would depend on the time period. Since there are only 100 people, at least 90% of them would have the same religion. Also, the chances of war and conflict are really low, because everyone would know each other.(Sorry my answer is so long)
