In this article, the students teachers' opinions, including rock formation and improper terms related to or different from these ideas, all of which are considered or must be considered in geology classes, have been analyzed. Alternative conception is used to inform our understanding of students teachers' ideas and describe any conceptual difficulties which are different from or inconsistent with the accepted scientific definition. The sample consists of 24 student teachers. We have stated that most student teachers have different alternative conceptions in mind even though they have previously followed one undergraduate Earth Sciences course. In order to explain the student teachers alternatives conceptions regarding rock formation, four basic unconscious beliefs have been discovered and described from the results of the analyses. These four beliefs, defined as: Rock--Scales of Space and Time--Stable Earth--Human Intervention, are used with the purpose of explaining the considered database outputs and alternative conceptions.