It was definitely a stalagmite. It was taller than me.stalactites are from the ceiling and stalagmites come from the ground growing upward......former spelunker here......and not the urban "where's the light switch for this room??...this cave is dark!!!!"........lol
We'd take a minimum of 4 to 5 sources of lights, back up bulbs, batteries, carbide, spare carbide in sealed container, drinking water, energy bars, etc... This was before the LED's of today. I remember having lower incandescent wheat age bulbs for my main light. You could get another 3 to 4 hours by lowering the amp draw on weak batteries, less light of course, but little light is better than NO LIGHT when you're 3 or more miles under the ground in southern IN or Kentucky!!!
Former spelunker also. Loved Buckners cave. Used to have a half dozen minimag lights with 2 strapped to my head. Good memories for sure.