Complex sentence: Another 19th century industry in the district is Garth Quarry at Minffordd, which was established in 1870 to make granite setts for road building in Victorian towns and cities and like the explosives industry this relied heavily on the coming of the Cambrian Railways in 1872.
Split into simpler sentences: Another 19th century industry in the district is Garth Quarry at Minffordd, established in 1870 to make granite setts for road building in Victorian towns and cities. Like the explosives industry, the quarry relied heavily on the coming of the Cambrian Railways in 1872.