The measured data are similar in many respects to our previous observations on Lonar crater rim shocked basalts (Arif et al. We measure some rock magnetic properties, e.g., NRM/χ (natural remanent magnetization /bulk magnetic susceptibility ), REM (=NRM/saturation isothermal remanent magnetization ratio expressed in %), and anisotropy of magnetic susceptibility (AMS) on 53 subsamples from 18 oriented drill cores of the shocked ejected basaltic boulders from the eastern half of ejecta deposit in the present study. These boulders experienced varying level of shock between 2–30 GPa due to impact, as indicated by the extreme fracturing of these basaltic boulders, fragmentation of plagioclase and titanomagnetite constituents of these ejected boulders, and the presence of maskelynite in them.

The continuous ejecta deposit around the rim of Lonar impact crater, central India, contains angular basaltic boulders of size ≤5 m. (D) Sketch map of the Lonar crater showing position of drilling sites (fi lled gray circles) for samples for anisotropy of magnetic susceptibility (AMS) study RH-PWD (Public Works Department) rest house sampling site of I. Abbreviations: c c and c e-centers of circle and ellipse drawn on the crater rim and maximum extension of the ejecta around the crater, respectively F 1 F 1 ′ and F 2 F 2 ′-faults, C c-circularity of crater rim (after Pike, 1974), C e and E e-circularity and eccentricities of ellipse at maximum extension of ejecta. (C) Geometric map of the Lonar crater based on the ASTER image and the aerial photograph. The darkest and lightest gray tones represent the lowest and highest elevation in this area (475, 560, 580, and 600 m contours shown by thick lines), legend as in Figure 1A note deformation of contours in the NE crater rim due to faulting. (B) Topographic map of the Lonar crater prepared from Shuttle Radar Topographic Mission (SRTM) digital elevation model (DEM) image with a contour interval of 5 m and image in background. Symbols: 1-Lonar village, 2-Lonar lake, 3-Little Lonar, 4-crater rim, 5-extension of continuous ejecta deposit, 6 and 6a-faults running across crater, 7-upper basalt fl ows having similar refl ectivity to that of ejecta and small hillocks around crater, 8-artifi cial reservoir (Kalapani dam), 9-tarred roads, 10-black paleosol, 11-vegetation. Note the circularity of the crater rim and presence of a continuous zone of high refl ectivity around it, which represents the ejecta.

(A) Gray-scale Advanced Spaceborne Thermal Emission and Refl ection Radiometer (ASTER) image of the Lonar crater, India, at 15-m resolution.

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