Dorsa Tetyaev

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Dorsum Tetyaev is in the bottom of the photo

Dorsa Tetyaev is a wrinkle ridge system at 19°54′N 64°12′E / 19.9°N 64.2°E / 19.9; 64.2 in the northeast part of Mare Crisium on the Moon. It is 176 km long and was named after Mikhail Mikhailovich Tetyaev in 1979. The ridge runs nearly north to south but slightly west, its starts north of Promontorium Agarum. At the northernmost terminus of the ridge is a mountain feature formed out of a crater that has been covered over by basalt lava. Further north of the plain (lunar sea) is Eimmart.