Answer:
C. The sample mainly consists of granite.
Step-by-step explanation:
Excavation can be defined as the process of digging out a part of a land mass (earth) either for archeological purposes or mining.
Earth crust refers to the outermost layer or thin shell which makes up the earth such as sedimentary, metamorphic and igneous rocks.
The Earth crust is typically made up of two (2) main types;
1. Oceanic crust: this crust has a thickness ranging from 5 km to 10 km and comprises of denser rocks such as diabase, gabbro and basalt.
2. Continental crust: this crust has a thickness ranging from 30 km to 60 km and comprises of minerals such as quartz, silicate, feldspar, aluminum and less dense rocks such as granite
Hence, if a scientist collects a core sample from 60 km deep in Earth. The characteristic which she will most likely observe in this sample is that, the sample mainly consists of granite because digging to a depth of 60 km would take her to the continental crust of Earth.