Wormy Lake Karst


Prepared by Robert Allen.

When around the Wormy Lake Karst, Peter Hews is in his element, or to pardon the pun, elements – calcium, copper, iron, etc.  Peter is a semi-retired geologist and a member of the Sunshine Coast Natural History Society and has given a few presentations at the Society’s monthly meetings.  A karst, as defined in the Oxford Dictionary, is “a limestone region with underground streams and many cavities” and a few months ago, Peter led a geology tour of the area, mainly on the north side of Wormy Lake.  Numerous mineralized areas were unearthed when an old road was opened up to provide access to the 2015 wild fire in the area.  As well as marble, iron, limestone, and copper showings, there are interesting folds in the rock, some stromatolites, and some caves, more properly termed caverns.

I learned all this geological information while accompanying Peter and another well-known Natural History Society member, Rand Rudland, to the site on January 6, 2019.  We were there to set in place an information sign board prepared jointly by Peter and Rand.  The sign is conveniently placed in the middle of numerous outcroppings and in close proximity to a very small cavern – much too small for a person to enter and probably too small even for a small dog to enter.  Peter and Rand had previously taken a number of photographs in the area and Peter did a short write-up for each one and Rand placed them all in an easily-read design on a sign that is 24” by 36”.

The sign is bolted into the rock and hopefully it will stay intact.  It is on the north side of Wormy Lake and just across the road from the east end of the boardwalk across the swampy area on the Wormy 150 Trail.  For those that haven’t done the Wormy 150 Trail, consider doing it while you are in the area.  It is a nice easy walk that will take between one hour and two hours to do as you walk all around Wormy Lake.  Parts of the trail can be wet and muddy during the winter months but it is well worth doing at any time of the year.


Rand and Peter drilling holes in the rock for the anchors.
The east end of the boardwalk is shown across the road.

Mixing the ‘grout’ to hold the anchors in place.

Rand and Peter with the sign being fastened onto the plywood backing.

Robert and Rand at the completed sign.

The new information sign board prepared by Peter and Rand.

Some of the nearby colourful rock formations.

Interesting rock formations.

Nearby cavern with the entry partially blocked off to prevent
small dogs from accidentally entering it.

One of the benches near the edge of Wormy Lake.

Photos by Peter Hews and Robert Allen and Sign board by Rand Rudland.