Figure 21 | Scientific Reports

Figure 21

From: Author Correction: A Tunguska sized airburst destroyed Tall el-Hammam a Middle Bronze Age city in the Jordan Valley near the Dead Sea

Figure 21The alternative text for this image may have been generated using AI.

Shocked quartz from known airbursts. (a) SEM image of 140-µm-wide shocked quartz grain from Tunguska airburst. Discontinuous lamellae formed along the (0001) plane. (b) Close-up SEM-CL image of same grain as in panel ‘a’. Lamellae spacing ranges from ~ 0.3 to 5 µm. Black lamellae indicate amorphous quartz (AQ). (c) Epi-illumination photomicrograph of 240-µm-wide shocked quartz grain embedded in trinitite that was ejected ~ 400 m from ground zero of the Trinity detonation. Discontinuous, sub-planar, sub-parallel lamellae are oriented along the (0001) plane. (d) Close up SEM-CL image of same grain as in panel ‘c’. Lamellae spacing ranges from ~ 2.5 to 6.5 µm. Black lamellae indicate amorphous quartz (AQ). (e) Epi-illumination photomicrograph of 520-µm-wide shocked quartz grain from Russia's Joe-1/4 nuclear detonations; displays discontinuous sub-planar, sub-parallel micro-fractures and lamellae, just as reported for impact-shocked grains in the Charlevoix crater56. There are four sets of lamellae, one of which is oriented parallel to the (0001) plane. (f) Close up SEM-CL image of same grain as in panel ‘e’. Lamellae spacing ranges from ~ 0.3 to 1.3 µm. Black lamellae indicate amorphous quartz (AQ).

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