Earth Sciences / Climate Change / Rock magnetism / Environmental Change / Physical sciences / Magnetic Properties / Iron / Little Ice Age / Environmental Magnetism / Gulf of Mexico / Earth and Planetary Science / Los Tuxtlas / Northern Hemisphere / Medieval warm Period / Conditional Inference Trees / Magnetic Properties / Iron / Little Ice Age / Environmental Magnetism / Gulf of Mexico / Earth and Planetary Science / Los Tuxtlas / Northern Hemisphere / Medieval warm Period / Conditional Inference Trees