TY JOUR TI Comparison of oceanic crust accretion features with low-velocity and ultralow-velocity spreading KW oceanic crust KW accretion KW spreading KW Mid-Atlantic Ridge KW Gakkel Ridge. JO Russian Journal of Earth Sciences AU Astafurova, E.G. AU Gurevich, N.I. AU Daniel', E.D. AU Mashchenkov, S.P. PY 2001 IS 2 PB Geophysical Center of the Russian Academy of Sciences