closed lips
What is the known annual rate of reduction in height of the Lips restriction?
What u/w caves here in FL have are the most changing topographically due to geological/hydrological events? We all heard of caving ceilings and sediment mound movements so which caves live the most "active" lives?
I'm sure that regardless of the rate of closure caused by nature the opening in the area used by divers is being worn wider much faster then it is narrowing.
I'm thinking that information has not been recorded. Don't worry, you can always take the bypass.
Capt Tim
Would a botox injection help?Originally Posted by ARY
FWIW, Gary is right, the Lips are at least 3" Higher than they were 30 years ago. The worst Diver "erosion" I know of are the "restrictions" known as Peanut, and Half-hitch.
Have to agree with you on that! In fact the "erosion" is such that they really aren't restrictions any longer.
FWIW, Gary is right, the Lips are at least 3" Higher than they were 30 years ago. The worst Diver "erosion" I know of are the "restrictions" known as Peanut, and Half-hitch.
Dave Grimm
Now there was only me and this timeless, eternal cave. I felt part of things, a tolerant guest.
by Rob Palmer from "Deep Into Blue Holes"
Why would the lips be higher?
( I was thinking higher from the bottom, not "wider" )
roadkill
Because tanks are harder than tummies.
Andrew Ainslie
Almost extinct cave diver
The "restriction" at the end of the roller coster (p1200') is an inverted trapazoid at least 6" deeper then 10 years ago (when is was a small round depression). The inverted trapazoid is, of course, not natural but caused by frog kicks thru the ex-restriction.
The backmount entrance to upstream cow was once so tight that removing tanks or going thru on a single was necessary in most cases.
And the Harper tunnel at Little River now goes several hundred feet farther then it used to now that the former "end" of the passage is worn large enough that no one would question the ability of a backmount diver to pass.
Peanut, and Half-hitch are worse?!?
Just curious, but why would you think it would be getting smaller? Cave development is by definition the removal of material. Now there are secondary processes such as sedimentation or breakdown modification that may reduce the effective passage size. But these are neither global nor constant.
Big rooms in caves often depend on breakdown and the subsequent weathering away of that to achieve their large size.
Even the 'softer' parts of you will scrape away some of that soft FL limestone.
Marbry
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