traprock
noun
trap·rock ˈtrap-ˈräk 
: any of various dark-colored fine-grained igneous rocks (such as basalt) used especially in road making
Example Sentences
Recent Examples on the Web Among their core complaints was that the plan entailed extensive blasting to flatten the traprock along Route 44 at Canton’s eastern gateway. 
Don Stacom, courant.com, 23 Feb. 2022 It’s made of diabase traprock, which contains iron that causes the cliffs to look lumpen and rusty in the wrong light, precise and resplendent in the right one. Christian Wiman, Harper's magazine, 20 Jan. 2020 Many buildings in New Haven are made of traprock, including some of the marvelous churches that grow older and emptier every year as God blinks out brain by brain like the species of flora and fauna that go extinct every day as ecosystems implode. Christian Wiman, Harper's magazine, 20 Jan. 2020 East Rock Park, a huge traprock knob that overlooks the Elm City, rises 350 feet above the banks of the Mill River with more than 12 miles of trails. Peter Marteka, courant.com, 22 Nov. 2019 For those who enjoy a vigorous hike to the top of a traprock ridge with commanding views of those same trees and those across central Connecticut, this is also the place to be. Peter Marteka, courant.com, 9 Oct. 2019 The bottom line: Trails lead to the top of a traprock ridge, the highest point in North Haven, with views north to Sleeping Giant and the Hanging Hills of Meriden, and south to the New Haven skyline and Long Island Sound. Peter Marteka, courant.com, 19 July 2019 Auerfarm State Park Preserve, Bloomfield Trails include grassy fields with beautiful views across the hills and mountains to the north in Massachusetts and west to Talcott Mountain and the Heublein Tower poking out of the top of the traprock ridge. Peter Marteka, courant.com, 18 May 2018 The trail twists and winds its way to the top along the traprock and basalt ridge. Peter Marteka, courant.com, 4 Mar. 2018 See More
Don Stacom, courant.com, 23 Feb. 2022 It’s made of diabase traprock, which contains iron that causes the cliffs to look lumpen and rusty in the wrong light, precise and resplendent in the right one. Christian Wiman, Harper's magazine, 20 Jan. 2020 Many buildings in New Haven are made of traprock, including some of the marvelous churches that grow older and emptier every year as God blinks out brain by brain like the species of flora and fauna that go extinct every day as ecosystems implode. Christian Wiman, Harper's magazine, 20 Jan. 2020 East Rock Park, a huge traprock knob that overlooks the Elm City, rises 350 feet above the banks of the Mill River with more than 12 miles of trails. Peter Marteka, courant.com, 22 Nov. 2019 For those who enjoy a vigorous hike to the top of a traprock ridge with commanding views of those same trees and those across central Connecticut, this is also the place to be. Peter Marteka, courant.com, 9 Oct. 2019 The bottom line: Trails lead to the top of a traprock ridge, the highest point in North Haven, with views north to Sleeping Giant and the Hanging Hills of Meriden, and south to the New Haven skyline and Long Island Sound. Peter Marteka, courant.com, 19 July 2019 Auerfarm State Park Preserve, Bloomfield Trails include grassy fields with beautiful views across the hills and mountains to the north in Massachusetts and west to Talcott Mountain and the Heublein Tower poking out of the top of the traprock ridge. Peter Marteka, courant.com, 18 May 2018 The trail twists and winds its way to the top along the traprock and basalt ridge. Peter Marteka, courant.com, 4 Mar. 2018 See More Word History
Etymology
trap entry 4
First Known Use
1813, in the meaning defined above