High Quality Content by WIKIPEDIA articles! Sabrina Ridge is a bare rock ridge between Sabrina Valley and Tamarus Valley, 5 miles (8 km) south of Derrick Peak in Britannia Range. Named in association with Britannia by a University of Waikato (N.Z.) geological party, 1978-79, led by M.J. Selby. Sabrina is a historical name formerly used in Roman Britain for the River Severn. Sabrina Valley is an ice-free valley between Pontes Ridge and Sabrina Ridge in the Britannia Range. Named in association with Sabrina Ridge by a University of Waikato geological party, 1978-79.