Final answer:
The yahoos were likely digging for meteorites, which are extraterrestrial rocks that may require laboratory analysis to confirm their origin.
Step-by-step explanation:
The yahoos would likely seek valuable meteorites, often requiring lab analysis to confirm extraterrestrial origin.
From the context provided, a student might be tasked with writing about rock samples, indicating a focus on igneous and metamorphic rocks. These would have different characteristics, like crystalline structure and mineral composition, that can be observed and summarized in a report, including photographs as evidence.
A well-composed report would provide a summary of the experience, discuss geological or natural history, and present observations of rock samples in an organized fashion, possibly making use of tables for clarity and aided with photographs for better illustration and confirmation.