Simplify the following text for a Grade 8 native English-speaking person.
Original: The significance of angular unconformity ( see below ) was shown by James Hutton , who found examples of Hutton 's Unconformity at Jedburgh in 1787 and at Siccar Point in 1788 .
Simplified: James Hutton found examples of unconformity in Scotland , at Jedburgh in 1787 and at Siccar Point in 1788 .