Hallett Cove Conservation Park

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December 11th 2005

Published: December 11th 2005


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The Hallett Cove walk
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Map Title: The Hallett Cove walk
Map Notes:
It is cool to have the ability to get this close with the satellitte imagery. The route map is a bit course but you get the general idea. By the way it takes about 35 minutes to drive to the park from our house.

Sugarloaf at HallettSugarloaf at Hallett
Sugarloaf at Hallett

The highlight of the Hallet Cove walk is the 'Sugarloaf' formation.

Planning



It has been forecast to be hot in Adelaide today (38 degrees) so we will start out early and visit Hallett Cove Conservation Park. We have done parts of this walk several times before - and it can be a little cool most days, but it is ideal on the mornings of hot days that are reasonably still (wind-wise) and bright (improving contrast between the blue sky and the eroded hills).

The reason we like this walk so much is the opportunity to learn more about rocks and geology (which is one of Dan's passions) and it is really amazing - you can see where the glaciers have been by looking at the scratches they left behind in rocks! There are plenty of signs along the path about the geology - so you can go from novice to scholar very quickly.

It is also a reasonably short walk and a short drive so we can come home for lunch.

Practicalities …


The park is suitable for most people who can handle stairs. To get there from the city, take Anzac highway, head South on Brighton Road, and then turn down the Cove Road to get to Dutchman’s drive down to the car park. There are toilets next to the deserted surf club rooms. Allow about 90 minutes to 2 hours to explore the park.


A web site that has a map of the park


Information from Friends of the park (but site under construction)

Images of Hallett Cove by another - in case mine don't work out

What happened ...


Well we got there reasonably early but it was already quite warm. We used small branches from the trees as fly swishers after our spray-on fly repellent behaved more like an attractant. The sea was quite smooth with only the occasional wave rolling in to the rocky shore. There were fishermen out on the rocks and in boats on the water so obviously there is some fish action around this place. We also saw some canoeists taking advantage of the reasonably still conditions.

The friends of the park have obviously been busy because large sections of the trail has been converted to boardwalk. This has made the walking easier and presumably will spare further erosion of the delicate soils. The birds we saw on this walk were mostly juvenile magpies which perched themselves on the hand rails of the lookouts. We couldn't decide whether they were catching a breeze on a hot day or they had worked out that people often stop there to eat and that a free meal might be available.

We took the path to the first lookout and then took the staircase down to the stony beach. We then walked up the creek which was still running. This creek is quite unusual because it disappears. The creek cascades down to the rocky shore and then the water slips under the rocks giving the appearance that the creek just ends.

The highlights were the amphitheatre and the Sugarloaf which are eroded structures that look quite striking.

Dan says …



This is the perfect place to start your rock collection. There are thousands of smooth rocks on the beach. There are many different colours to choose from - grey, green, red, white, black, chocolate, and even orange. Some rocks even have layers (they are called sedimentary rocks). You won’t find igneous rocks here (they are the lava ones from volcanos -such as granite). You could find metamorphic rocks here (metamorphic means changed). You may be thinking - but how can rock be changed? Well, rock can be changed by heat or pressure or both. A weak soapstone can be turned into hard slate by pressure and heat. Marble is a metamorphic rock made by pressure.

I thought that the Sugarloaf formation looked like a volcano. There were lava-red rocks at the top that made it look like there was lava in it.

All through the walk you can see rocks sitting in funny places. These are called erratics (aka dropstones) which have been carried by glaciers and dropped in funny places when the glacier melted.

This weeks joke …
Q: What do you get if you cross a chicken with a cement mixer?
A: A bricklayer





Diana
About us We are a family who use our Sundays to discover, explore and enjoy the serenity of the world around us while getting some exercise. We live in Semaphore, a beach-side suburb of Adelaide, South Australia. Although Adelaide and it's suburbs are quite flat, there is a range of hills that run North-South that provide for many interesting walks. Here are some quotes that say some of what it means to us to go out bush walking. In every walk with nature one receives far more than he seeks. - John Muir Climb the mountai... full info
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Fisherman on rocks Fisherman on rocks
Fisherman on rocks

Taken from first lookout
Glacier scratchesGlacier scratches
Glacier scratches

The sign said - You are looking at a part of the landscape that was covered by ice about 280 million years ago. This polished and scratched rock surface (glacial pavement) has made Hallett Cove famous. ... As the ice moved northwards over this ancient landscape, sand and silt in the base of the ice polished the bedrock to a smooth finish-like a giant piece of sandpaper. Larger rock fragments made the long straight scratches known as glacial stiations. These were exposed when the ice melted.
Dan on an ErraticDan on an Erratic
Dan on an Erratic

'Erractics' are rocks that were carried to unusual locations by glaciers.
Dan near the cascadeDan near the cascade
Dan near the cascade

Shortly after this the water from this creek just disappears
Pig facePig face
Pig face

Near the creek
MagpieMagpie
Magpie

Nice song but very cheeky
Learn about geology as you walkLearn about geology as you walk
Learn about geology as you walk

There are many signs along the path that allow you to get an understanding of the different layers that make up this ancient landscape.
View following the hill climbView following the hill climb
View following the hill climb

The sign said - the amphitheatre - uplift of the land one to 2 million years ago, resulted in erosion which produced the present amphitheatre landscape. As you walk into the amphitheatre you will pass through layers of sediments from three distinct periods of deposition which started about 280 million years ago. Erosion by water has exposed these layers.


Comment on Hallett Cove Conservation Park




Comments
Date: 21st December 2005

From the Rock Master
I like that name - thanks for your comment guys. Hope to meet Holly soon.

From Blog: Hallett Cove Conservation Park
Date: 5th April 2008

conservation park
Enjoy, interact, touch, inspect, feel and generally get hands on. But, leave the rocks in a conservation park in the conservation park for everyone to enjoy. NOT IN YOUR OWN PERSONAL ROCK COLLECTION. If everyone who visits the park did that as you suggested, and not just one but one of each colour; then there will be no more rocks for ALL to enjoy and be educated by.

From Blog: Hallett Cove Conservation Park
Date: 10th April 2008

Igneous rocks
Hi. Good pictures and comments about Hallett Cove Conservation park. However, there are igneous rocks present on the southern beach... they are granites and porphyritic microgranites which came from east to southeast of Victor Harbour in a glacier during the permian period. They are hard to find though. It says this in the 'Hallett Cove Conservation Pary Management Plan', Department of Environment and Planning 1986.

From Blog: Hallett Cove Conservation Park
Date: 21st January 2010

rock collection no-no
Dan, it's illegal to remove rocks from the park (see the park website). I like your page, but please remove the suggestion that the park's a perfect place to start a rock collection.

From Blog: Hallett Cove Conservation Park
Date: 9th April 2010

Ancient Rocks
Hi Was at halletts cove last may went down to the rocky beach. Found some old rocks and pebbles to inspect in the hand. Could these be many millions of years old? Thanks David.

From Blog: Hallett Cove Conservation Park



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