Projection of the low-α Splash (green dots) and high-α Splash (orange points) in the (a) [Mg/Fe]–[Fe/H], where the dotted line indicates the separation between high- and low-α regions; (b) [Mg/Mn]–[Al/Fe], where the dashed line represent the limit between accreted and in situ regions; (c) Toomre diagram, ﹩\sqrt{{V}_{R}^{2}+{V}_{Z}^{2}}\,{\rm{versus}}\,{V}_{\phi }﹩. The vertical dashed line is V_ϕ = 100 km s⁻¹. The innermost curve represents ∥v − v_circ∥ = 130 km s⁻¹ and the outermost curve is ∥v − v_circ∥ = 220 km s⁻¹; (d) V_ϕ–[Fe/H] space, where the horizontal dashed line is V_ϕ = 100 km s⁻¹; (e) Z_max–eccentricity and (f) Z_GC–R_GC, where the horizontal dashed line represents the Galactic plane (Z_GC = 0 kpc), and the red star indicates the position of the Sun. In all panels, the gray points are the APOGEE sample, and the gray contours indicate the density of the low-α region. The difference between light green points and green points with a black border is only the range of metallicity of the stars.