Originally Posted by powderbluetang
they are replaced by the volcanoes
I would like to see your reference, other than the one you mentioned, that will substantiate this statement. I do not believe it to be factual.
I did go to the page you suggested and found the following information:
"First of all, most of what we normally consider as "rock" is a mineral structure formed by: compounds settling in ancient oceans and lakes (sedimentary), minerals that were once melted and spewed out of the earth by volcanoes (igneous), and sedimentary deposits that were transformed by great pressure created by overlying deposits (metamorphic)." (quoted from www.aquariumarts.com/liverock.html)
This states that some
of what we consider rock did in fact come from volcanoes. It also clearly states that quite a bit of it did not. The text goes on to say the following:
"Live rock is a calcareous (limestone) structure that is formed by the deposition of many species of living (stony) corals and other invertebrates, forming either deep ocean or shallow coastal reefs. Some coastal reefs grow toward the surface of the water and form a barrier to the island or continent (Great Barrier Reef of Australia) that may cause ship wrecks." (quoted from www.aquariumarts.com/liverock.html)
As I stated earlier, if you have any other reference to back up your statement that LR
comes from or is replaced by volcanic activity, I would be most interested to read it. Also, I would be interested in your definition of "geesh"? It is not listed in my dictionary nor does it have any reference at dictionary.com.
To answer the posted question, yes I do think LR
collection will eventually become a problem. IMO
there will be stricter regulations in the future concerning taking LR
from the reefs. As stated before, some of the collected rock is broken off of the reefs in storms. Some of it is broken off the reefs by collectors. I think the future will be in aqua cultured rock and man made rock. There are good references to the man made rock on www.garf.org
under the name "Aragacrete" if you're interested in reading up on it.