English 1983 Guinea earthquake Cited by user Alex of Canada on 12 Jan 2018 On December 22, 1983 an uncommon magnitude 6.3 earthquake struck northern Guinea, killing around 300 people, and injuring 1,500.
English Euxinia Cited by user Johna.winters on 15 Mar 2017 Euxinia or euxinic conditions occur when water is both anoxic and sulfidic. This means that there is no oxygen (O2) and a raised level of free hydrogen sulfide (H2S).