"Geo-tologist" is not a recognized scientific term. It's likely a combination of "geo" (referring to the Earth) and "-ologist" (meaning someone who studies something).

However, there are several related terms:

* Geologist: This is the most common and accurate term for someone who studies the Earth's physical structure, composition, history, and processes.

* Geomorphologist: Studies the Earth's landforms and how they are shaped by natural processes.

* Petrologist: Studies the origin, composition, and structure of rocks.

* Mineralogist: Studies minerals and their properties.

* Sedimentologist: Studies sedimentary rocks and the processes that form them.

So, depending on the specific field of Earth science being studied, you could use one of these terms instead of "geo-tologist."