Modern laboratory facilities are an integral part of earth science research. The Department of Earth Sciences at Dartmouth College is well equipped, with a variety of modern research facilities, including: a variety of thermal ionization and gas source mass spectrometers, inductively coupled plasma mass spectrometers and optical emission spectroscopy, gas and liquid chromatographs, a gas chromatograph-isotope ratio mass spectrometer, a confocal Raman microprobe, infrared spectrometer, and research-grade petrographic microscopes. These instruments and others are described in descriptions of individual laboratories below. The department is also equipped with general user computer labs for remote sensing, GIS and modeling, and college-supported general user facilities such as X-ray diffraction, rock cutting, scanning and transmission electron microscopy. The Earth Sciences Department is also located proximal to the Departments of Physics, Chemistry, and Geography, and the Environmental Studies Program, each of which offers extensive analytical facilities available for general use. Kresge Library, which houses the Dartmouth College Physical Sciences Collection, is also housed within Fairchild Hall.