Q8.1 Cross-Cutting Relationships [SE]
Q8.2 Dating Rocks Using Index Fossils
Probable age: 92.6 to 92.7 Ma. If M. subhercynius was not present the interpreted age range would be 92.6 to 92.9 Ma
Q8.3 Isotopic Dating
With a ratio of 0.91 the age is 175 Ma (red dotted line)
Q8.4 Magnetic Dating
The possible age ranges are 3.05 to 3.12 Ma and 1.78 to2.00 Ma
8.5 What Happened on Your Birthday?
Answers will vary.