Earth Sciences:
* Petrologists: Study the origin, composition, and structure of rocks.
* Mineralogists: Study the composition, structure, and properties of minerals.
* Geochemists: Study the chemical composition of the Earth and its processes.
* Geophysicists: Study the physical properties of the Earth, including its gravity, magnetism, and seismic waves.
* Paleontologists: Study fossils and ancient life forms.
* Seismologists: Study earthquakes and the Earth's interior.
* Volcanologists: Study volcanoes and volcanic activity.
* Hydrogeologists: Study groundwater and its movement.
Other Sciences:
* Environmental Scientists: Study the interactions between humans and the environment. Geologists contribute expertise on soil, water resources, and pollution.
* Civil Engineers: Design and build structures, roads, and other infrastructure. Geologists provide information about soil conditions, rock formations, and seismic hazards.
* Environmental Engineers: Design and implement solutions to environmental problems. Geologists can contribute expertise on soil and water pollution, and geological hazards.
* Atmospheric Scientists: Study the Earth's atmosphere. Geologists can contribute expertise on the effects of volcanic eruptions and other geological events on the atmosphere.
* Biologists: Study living organisms. Geologists can contribute expertise on the geological history of life and the relationship between organisms and their environment.
* Climatologists: Study the Earth's climate. Geologists can contribute expertise on past climate change and the role of geological processes in climate change.
This is just a small sample of the many scientists who work with geologists. The specific collaborations will depend on the specific area of geology and the research question being addressed.