Boart Longyear Longyear, which eventually became Boart Longyear. He drilled his first diamond drill core hole in 1890 in northern Minnesota. Longyear's company developed the wire-line retrieved Q core barrel. Longyear was inducted into the National Mining Hall of Fame in Leadville, Colo in 1990. On March 1, 2016, Mr. Jeffrey Olsen was appointed President and Chief Executive Officer of Boart Longyear. He joined the company as the Chief Financial Officer in March 2014. Boart Longyear conducts contract drilling services in more than 40 countries, and provides mining products to customers in over 100 countries. Boart Longyear Boart Longyear is a global
Teisserenc de Bort (crater) gigantic Huygens to the southeast, Dawes to the southwest and Janssen to the northwest. Further north of the crater is a valley known as Locras Valles. A picture below shows dark slope streaks. The darker the streak, the younger it is. Teisserenc de Bort (crater) Teisserenc de Bort is an impact crater on Mars, located in the Arabia quadrangle at 0.4° N and 315.0° W. It measures 119 kilometers in diameter and was named after French meteorologist Léon Teisserenc de Bort (1855–1913). The name was adopted by IAU's Working Group for Planetary System Nomenclature in 1973. The crater are one