Do I hear the grunt of a shifting paradigm?
On the underwater "ruins" and basalts.
Many rocks, whether sedimentary, igneous or metamorphic, have natural cooling joints or other planes of weakness. Brittle fracture tends to produce sharp surfaces, frequently at 45 degrees to the compressive stress. Add some moss and gunk and these can look very artificial, precisely because we think angular "structures"do.
Cooling joints in basalt are usually curved, in point of fact. To see similar structures in miniature, examine dried clay in any dried up puddle. Polygonal cracks are the rule, rather than exceptional. In a thick lava flow, the outer surfaces cool first and the cracks propagate through the flow. They don't always meet, either.
Without going to the underwater site, who knows? The fact remains that linear, planar or pseudo-geometric structure in rock is not in itself evidence of human activity. Tools, cigarette butts etc., graffiti- that's what to look for.
And people selling sausage. In a bun.
On the underwater "ruins" and basalts.
Many rocks, whether sedimentary, igneous or metamorphic, have natural cooling joints or other planes of weakness. Brittle fracture tends to produce sharp surfaces, frequently at 45 degrees to the compressive stress. Add some moss and gunk and these can look very artificial, precisely because we think angular "structures"do.
Cooling joints in basalt are usually curved, in point of fact. To see similar structures in miniature, examine dried clay in any dried up puddle. Polygonal cracks are the rule, rather than exceptional. In a thick lava flow, the outer surfaces cool first and the cracks propagate through the flow. They don't always meet, either.
Without going to the underwater site, who knows? The fact remains that linear, planar or pseudo-geometric structure in rock is not in itself evidence of human activity. Tools, cigarette butts etc., graffiti- that's what to look for.
And people selling sausage. In a bun.