The discussion revolves around a photo contest themed around geology, specifically focusing on rocks and related formations. Participants are encouraged to submit their own digital photographs of rocks, cliffs, and geological features, adhering to specific rules regarding photo size and editing. The contest emphasizes originality, requiring that all submissions be taken by the participants themselves. Various members share their experiences and photos from locations like Moab, Utah, and the Alps, discussing geological features such as petroglyphs and ancient rock formations. Technical issues with photo uploading and sharing are also addressed, with suggestions for using different photo hosting services. The conversation highlights a shared passion for geology and the beauty of natural rock formations, fostering a community of enthusiasts eager to showcase their work.