Campaign seed: Prior Indigneous Technological Species

[malloyd]

Originally Posted by ericthered

Would the high iron content stand out? What would all the glass turn into? would the concrete look like normal limestone or would it be distinctive? would our mixture of building materials give us away as a technological species? Are there any objects that would survive long enough due to strength and resistance to corrosion.

Glass is actually pretty stable. Obsidian is volcanic glass, and we use tektites as evidence of ancient impacts. Metals corrode and dissolve so easily they probably don't hang around millions of years, but provided they get buried fast enough, there's no reason to expect brick or concrete or glass or ceramics or cut stone not to last millions of years.