while examining harry’s ankle, the doctor explained that there are many bones associated with the ankle, and different types of joints occurring between different bones. she then sent him off to have an x-ray to help her better determine the damage.

Layer r contains a well-known index fossil that is 100 million years old. based on this information and the principle of superposition, a. layers t and m are older than 100 million years, and layers x and g are younger than 100 million years. b. layers t, m, x, and g are all older than 100 million years. c. layers t and m are younger than 100 million years, and layers x and g are older than 100 million years.