Fossils are the preserved remains or traces of animals, plants, and other organisms from the remote past. Fossils vary in size from microscopic, such as single bacterial cells [2] only one micrometer
in diameter, to gigantic (macroscopic), such as dinosaurs and trees many meters long and weighing many tons. [Wikipedia]
Fossil fuels or mineral fuels are fuels formed by the natural resources such as anaerobic decomposition of buried dead organisms that lived up to 300 million years ago. These fuels contain high percen
tage of carbon and hydrocarbons. [Wikipedia]
Ground ice found in regions of permafrost, or in other regions where present-day temperatures are not low enough to have formed it; ice that was formed in the geologic past.
Sedimentary structures of past episodes that show ancient wedges, which have been filled by sediments and ice preserving the original cryogenic form. Fossile ice wedges are an indicator for mean annua
l paleotemperatures between -3.5 and -8C depending on the host material.