Your class goes on a field trip to observe drilling machinery the geologists at the drill site show you displays of drilled rocks to compare different types of drills and methods the drilled holes in one rock display are significantly larger than the holes drilled in the display next to it
The geologists explain to your class that the difference in hole sizes is due to the different types of drills and drilling methods used. One display shows rocks that were drilled using a rotary drilling method, which creates larger holes by rotating a drill bit against the rock formation. The other display shows rocks that were drilled using a percussive drilling method, which involves pounding a drill bit into the rock to create smaller holes.
The geologists go on to explain how different drilling methods are used depending on the type of rock formation and the intended purpose of the drilling. They discuss the importance of understanding the geology of an area and selecting the appropriate drilling method to obtain accurate and reliable data.
As you observe the drilled rocks and listen to the geologists' explanations, you gain a better understanding of the importance of using the right drilling equipment and method for geological exploration and resource extraction. It is a valuable lesson in the field of geology and the practical applications of drilling machinery in the study of the Earth's crust.