palaeoclimatology(The study of paleoclimates throughout geologic time, and of the causes of their variations, on either a local or a worldwide basis. It involves the interpretation of glacial deposits, fossils and sedimentologic and other types of data)
palaeontology(The study of life in past geologic time, based on fossil plants and animals and including phylogeny, their relationship to existing plants, animals, and environments, and the chronology of the Earth's history)
palaeoecology(The application of ecological concepts to fossil and sedimentary evidence to study the interactions of Earth surface, atmosphere, and biosphere in former times)