Original sentence: Devon gave its name to a geological era: the Devonian era, so named by Adam Sedgwick because the distinctive Old Red Sandstone of Exmoor was studied by geologists here.The county is occasionally referred to as Devonshire, although that is an unofficial name, rarely used inside the county itself and often indicating a traditional or historical context.This geology gives rise to the landscapes of Dartmoor and Exmoor, which are both national parks
Edited sentence: Devon gave its name to a geological era: the Devonian era, so named because of the abundance of the grey limestone found there.It was Roderick Murchison and Adam Sedgwick who originally named the Devonian Period following research they carried out in Devon, and in particular, Torbay.Outsiders have traditionally shortened the name to Devon and this version is now widely recognized in official departments due to the influence of centralized (Westminster) government.The namer "Devon" is an abbreviation of "Devonshire", the latter being the correct title and widely used within the county by true Devonians.They found some unusual marine fossils in the limestone at Lummaton Quarry and it was this discovery that lead to the time period becoming known globally as the Devonian.This geology gives rise to the landscapes of Bodmin Moor, Dartmoor and Exmoor, the latter two being national parks