DARK MATTER IS RIGHT UNDER OUR NOSES AS ( BALL) LIGHTNING and FULGURITES. ( Not math but observation and imagination is the key to reality. Black holes have intense gravity but also a fermion repelling horizon to blow Fermi bubbles and jets)
This molten and uncovered beach sand is showing that a lightning stroke hitting the local beach and came from left above deep into the ground and the smaller vertical sand pillars seem to be the result of decaying falling dark matter hotspots as shown in the tree picture.
Only a part of the created vertical sand pillars are visible because these hotspots fell right from above the lightning stroke and merged with the main channel. The rest did not merge and fell at the sides of the main channel.
Fulgurite phenomena are mostly found on beaches standing upright or half uncovered by the sea waves above the sand.
Q-FFF Theory says: Dark Matter is the same as fuzzy String Knots of all sizes black holes, from (ball) lightning up to Comets, Sunspots, dual Herbig Haro hotspots and the Big Bang. The origin: A new physics Fermion repelling Black Hole horizon.
See: Fulgurite created by Lightning bullet also known as ball lightning, according to Quantum FFF theory. https://vixra.org/pdf/1805.0307v1.pdf
and: New Black Hole Physics, by Fermion String knot based Repelling Black Holes. the Origin of Quick Star/Galaxy Formation. https://vixra.org/pdf/2007.0044v1.pdf
and: Herbig Haro Astrophysics Based on Dual Rigid String Black Holes. https://vixra.org/pdf/2007.0158v1.pdf