Geology Part 1 – Stories from the Great Southern Road Trip

Road sign saying Geology Point

Confessed Geology Nerd!

I’m a rock nerd! I have more than a passing interest in geology and geological formations. Given that I’m a high school science teacher I feel that interest is very legitimate! While my knowledge is rudimentary, (my degree was mostly chemistry) I know enough to be able to read the stories held in rocks. Although it’s more like the abridged Readers’ Digest version, the outline is there! I know the difference between igneous, sedimentary and metamorphic rocks but can’t identify many by name. My recent Great Southern Road Trip gave me lots of opportunities to check out some interesting scenery. 

Geology and Geotourism is an increasingly popular way to travel and Geotrails are becoming more common.  I have a great map called the Geotourism Map of NSW but I have not found one for the other states. It gives locations and details of some of the interesting formations.

This post shows some of the features I snapped along my way down the NSW coast and then in Tasmania. I missed plenty! I will just have to go back on another road trip – darn. I will give the broad brush strokes of what took my interest rather than a detailed explanation of the geology or geological history. (If you’re a geologist I’m happy to have your input in the comments below!)

Originally, I was planning on covering the geology encountered in both NSW and Tassie in this one post but its getting too long so I’ve split it into a two parter.

Far South Coast of NSW

Jervis Bay – Moe’s Rock and surrounds

I don’t know who Moe was but the rock platforms in this area look bubbly and aerated. More likely there is some differential weathering of the sandstone. The colour of the sandstone also varies significantly. The lumpy, almost pillowy surface adds a lot of interest. While you are here in Booderee National Park have a look at the Cape St George Lighthouse. For the pedantic, Jervis Bay is actually not part of NSW but is governed by the ACT. In addition to whiter than white beaches there is a large-ish naval base there.

Bateman’s Bay – Denham’s Beach.

At the north end of Denham’s Beach there are two interesting features. Firstly the nicely folded rock wall and secondly the large potato like rocks strewn over the rock platform. When I first came across them, I really thought they were potatoes. Smooth, round and light coloured. Some have a coating of green algae. The rock wall has several very distinct strata. At the base is the dark rock which also makes up the platform. It is overlaid with lighter rock with embedded darker stripes.

Eden – South End of Aslings Beach

At the south end of Aslings Beach there is a magnificently striated and folded rock wall. At the base, there is a man-made rock pool. The layers are multi-coloured and in the right light glow with a rich red hue. These two photos taken at different times of the day and from a different angle and show off the folds and erosion.

Light to Light Walk – Green Cape National Park

You can walk from Boyd’s Tower to Green Cape Lighthouse. It is a 33 km walk and typically done over two days. Along the way there are LOTS on interesting features. The colour of the rocks is spectacular especially in contrast to the green-blue ocean. If you don’t want to do the walk, you can still access some of the spots via road. I did parts of the Light to Light Walk and have written about it in another post.

Australia’s Highest Peak – Mt Kosciuszko,

A COVID lockdown in Victoria meant I needed to change my plans (quickly!!!) and head west. I climbed to the top of Mt Kosciuszko on a fine sunny day via the Main Range Loop Track. I have written a separate post about the walk. The landscape is dominated by large granite tors. You can read about how tors form on Wikipedia.

The Rock – near Wagga Wagga

Maybe a little more thought could have gone into the name for this particular landform? The Rock juts out from the landscape very dramatically and is about 30 km south-west of Wagga Wagga. There is a walking trail to the summit, which according to the NSW National Parks and Wildlife Service, is a 6 km return walk. At this stage of my road trip I was a tight schedule to get to Melbourne to board the Spirit of Tasmania, so whizzed past without stopping! (Except to pull over to take the photo!!)

The Rock from the Olympic Highway

Part 2 – Tasmania

Check out my next post showcasing the geology and some of the geological features in Tasmania. Coming soon!

Cruising the Gordon River Tasmania

Tree huggers win

The Gordon and Franklin Rivers have close to mythical status in Australia. They symbolise the start of the political party “the Greens” and intervention by our Federal Parliament into what had previously been considered State business. 

Back in the 1980’s the Tasmanian Government planned to dam the Franklin River for the purposes of hydroelectricity. A massive and effective protest movement arose with a strange alliance between old loggers and “tree-huggers” to protect the wild rivers. 

Eventually in 1983,  the newly elected Federal Labor Government led by Bob Hawke stopped the development and the area is now a UNESCO World Heritage protected area. 

The pristine, undeveloped and wild area cannot be easily accessed by vehicle and most areas remain undisturbed except by intrepid bush walkers. Several tour companies also run river cruises for the first 12 km of the river. They are required to travel at very low speeds in the river  to prevent bank-damaging wash. No commercial crusies are allowed beyond the 12 km mark. 

The area near Strahan had been selectively logged for the fabled Huon Pine since colonial settlement but now, no commercial activity other than boat cruises are allowed on the river.

World Heritage Cruises

As part of my Great Southern Road Trip, I booked a Premium seat (aka window seat) with World Heritage Cruises. The cruise leaves the jetty at Strahan at 9 AM and returns at approximately 3PM. Prices vary but I paid $165. In the height of summer (December and January) there is a second afternoon cruise. 

The cruise includes lunch. Normally a buffet, but in these times of COVID it was a prepackaged bento box with a bread roll, cold meats including smoked salmon, salad and cheese. Drinks and snacks can be purchased separately throughout the cruise. If you book a Gold ticket, morning tea is included.

The cruise takes you out of Macquarie Heads through “Hell’s Gates” a very narrow opening to the ocean, Sarah Island, an aquaculture area and the Gordon River. At the end you can also watch a traditional saw mill in action cutting up salvaged logs.  

You get off the catamaran at Sarah Island for a half hour walk around with a very entertaining guide from the Round Earth Company and you can also leave the boat at the 12 km turnaround point for a short board walk through the forest. 

There is extensive commentary from the boat’s captain and owner as well as some video clips displayed on monitors. This commentary was detailed and interesting. The Grining family who runs this particular cruise company have lived in the area for generations. Firstly as loggers, then loggers with a tourist side business and now the tourism business is their main activity. The family were also actively involved in the 1980 protests. The Grining family lobbied their passengers to sign a petition, ran supplies to the protesters as well as ‘smuggling’ in new protestors to the protest line.

Sarah Island

Sarah Island is a small island in Macquarie Harbour. It was a penal settlement for secondary offenders, that is convicts who reoffended. It was a “hell on earth” with harsh weather adding to the man-made deprivations and frequent floggings. Many of the convicts tried to escape. It’s history is bloody and it was closed after 12 years and the convicts moved to the equally infamous Port  Arthur. The history of Sarah Island is certainly worth checking out. 

As you can see it was raining heavily!

Poor weather

The Western coast of Tasmania is wild and the weather can be just as wild. At a latitude of 40o South the area is buffeted by the “roaring forties”. The next closest landmass in South America. It rains here frequently with the average annual rainfall being a little over 2 metres.

On the day of my booking it was raining heavily and cold. Visibility was poor but the sea was relatively calm. When we got out at Sarah Island, even though I had wet weather gear on, I still got soaked through. Cold I know is a relative thing. Cold here in Australia counts as anything less than about 15C! The previous day had been clear and 25C but on this day it maxed out at 15C.

One of the lighthouses at Hell’s Gate.

The boat

The Harbour Master 2 was only launched in 2020. It is an impressive double hulled aluminium catamaran. It has comfortable fittings and seats. It has large windows and open decks at the front and rear. There is a bar/cafe. As stated they usually serve a buffet but because of COVID restrictions still in play they served prepackaged Bento boxes.

Gold Tickets holders sit on the top deck and have access to the roof deck. When you are boarding and awaiting departure watch the time lapse video of the boat’s construction.


Despite the poor weather, it was still a good day out and I would recommend it. There are other tour companies which run similar trips. Gordon River Cruises also have a catamaran and Stormbreakers run an over night cruise in a sailing boat. I wish I had of seen this before I booked the other cruise!

Note: because of the poor weather and reduced visibility I don’t have many photos! I did make this tongue-in-cheek video of highlights.

Urban Nature Study – Part 1

Earlier this year I volunteered to take part in an Urban Nature Study for an Honours student at the University of Wollongong. The study involved two Zoom interviews and three urban walks. On these walks I was required to take notice and record my interactions with urban nature. This included what I could hear, see, smell, and feel. To help me remember what I observed I made notes on the voice recorder app.

During the walks I was encouraged to take photos of the things I saw. It was pretty much the perfect sort of study for me! To top it off it we were still under some COVID restrictions so it was not as if I was doing anything else.

The student has submitted her work and I have permission to publish my contributions. I am not sure what her ‘findings’ were. Here is the first of my 3 walks. I have changed some of the street names.

Urban Nature Diary Day 1 – 13th June 2020

Saturday Beach Walk

My walk today was one of the two routes I take frequently. I call this route my “beach walk”.  The other is my “neighbourhood walk”. I sometimes run these routes rather than walk.  Today, I ran part of the way and walked part of the way as I was stopping to take photos. All up it took me about 1 hour 20 minutes.

This route takes me along Crown Street, past the hospital and railway station into the CBD, I then walk down to Smith Street and head to the beach from here. I walk past Levendi’s (a cafe), along the harbour, past the lighthouses and then past WIN Stadium. When I have the time (as on weekends) I extend the route and walk along the beach to the end of the golf course cut back up Swan Street under the railway bridge, up Gladstone Street, X Ave, Y Street, and then finally back onto Z Street and home. This is a little over 8 km. If I’m in a hurry, I cut back up to the WEC (Wollongong Entertainment Centre) and head back home through the Mall. If I’m running, I can do it in 50 minutes.

And we’re off…

This morning I left home at around 7:30 AM. There was a partial cloud cover. It was fine and crisp. It had been raining overnight so there were puddles and wet leaves on the ground

My phone said it was 12.7oC and dead calm.  I had dressed in long tights and a long sleeve lycra hoodie, joggers and socks. I normally listen to music or podcasts while I walk. Today it was a podcast.

The ground was wet, and the leaves made it slippery, so I picked my way out my driveway. The large liquid amber at the corner of my driveway drops so many leaves and I have slipped there before so I am always cautious.

The creepy tree

Just before you get to the hospital there is a huge Morton Bay Fig in a tiny park. There is very little room left in the park for anything but the tree. (Image 1) I really like this tree and have wondered how old it is and what it must have been like before it was hemmed in by the road and houses. It would make a good climbing tree as the branches hang down low to the ground. However, it would be near impossible to climb as the limbs are very broad and smooth. The buttress roots spread out for at least 5 metres in all directions.  I call it the “creepy tree” because it does not matter what time of day it is, the massive tree is always casting a shadow on the park. It smells dank and composty.

Image 1 – The Creepy Tree

Noisy traffic in the shopping precinct

The noise of the traffic makes it hard for me to hear any birds, but I did notice some dead or close to dead earthworms who had boldly ventured onto the pavement when it was raining and had now become trapped on the drying pavement. A bit of styrofoam captures my attention and I get annoyed and feel that the hi-fi store (likely source of the foam), should be held to account for the amount of foam that blows out of their bins and ends up as pollution on the street near their shop.

This part of the route is in my opinion, nothing but “urban”. It is paved and built up. There are few gardens as most of the premises are commercial. In the CBD itself, the council is attempting to green things up. (Images 2 – 4) 

It’s sad to see that their bright little street flower boxes are the target of vandals (Image 5)  If there are council workers watering the plants or replanting what has been ripped out, I’ll thank them for their work so hopefully they don’t get too downhearted that not everyone appreciates the little bit of colour the boxes provide. I notice the raindrops sticking to the leaves of plants. (Image 6)

Wollongong Harbour

Once I get to the harbour, I join the many others who are enjoying a walk or a run on this nice morning. The clouds are making a dramatic backdrop to the little lighthouse and Belmore Basin. Some pelicans are preening, and people are out in kayaks paddling on the smooth water. (Image 7)

Image 7 – Belmore Basin

There is a reasonable swell and some surfers are clustered at the end of City Beach. The water must be colder now as most are wearing wet suits.  (images 8 and 9)

It’s warming up and I am regretting that I didn’t wear a T-shirt and jacket rather than the hoodie which I can’t take off. 

Image 10 – Dead Calm

On the Beach

It’s dead calm.  (Image10) the air is clear and fresh, but I lament that it is not as clear as it was a few weeks ago when we were deep in COVID lockdown and the sky had a fresh luminous blue with no pollution hanging about in a brown haze.

Image 11

Once I get to WIN stadium and the footy field/golf course junction I head down to the beach. I take a lot of energy from the ocean and enjoy seeing it every day. For me, it’s peaceful and rugged and energising all at the same time. It’s mid tide so there is some compacted sand to make the walk easier. I have to dodge a few incoming waves to prevent getting my shoes wet but this adds to the fun. The sand shows evidence of last night’s rain with the little pock marks dimpling the sand. (image 11)

There are a few shells. (image 12) Last time I was on the beach there were lots of rocks and pebbles at the wave line and I notice that this time there are very few rocks. I wonder if they were carried away by last week’s big surf or if I was at a different part of the beach. Up ahead I see the little pebble “garden” I was looking for and figure that they do probably get moved as a result of the tide. (image 14.)

Image 13 – Roof tile?

Not a rock

I take especial interest in an unusual green “rock” (Image 13). I pick it up and turn it over in my hands. I decide that it’s not a rock after all and probably a piece of roof tile that has been washed down a creek. I’m on the lookout for sea-glass[1] as I collect interesting bits of that.

This is an off-leash beach but there are few dogs. A couple of gulls fly past skimming close to the sand. The air smells salty but since there is no wind to whip the sea spray into my face, I don’t taste it.

As I re-join the road and the buildings, I can hear some rainbow lorikeets squawking and fluttering in a large flowering gum near the dog training park on Swan St. There are some magpies or crows cawing as they fly overhead. I pass a garden which has some nice succulents spilling over the fence and I break off a small piece to bring home and plant in my own garden.

The home stretch

I am about two kilometres from home and I am now very much regretting the choice of outfit! The sun is rising higher and I am getting hotter! It’s a balance between going faster to get home quicker and overheating! On Gladstone Ave there are a few private gardens with some lovely old roses, but today most only have a few straggly petals left. There is also a house with a reasonable size quince tree. They don’t pick the quince and they fall on the ground every year. Each year I say to myself, “next year I am going to knock on their door and ask if I can have them before they go rotten!”

The large date palms on X street, always make me think of the cover of Hotel California (an album by the Eagles).

(I included that detail because the person doing the interview was very young and possibly not a 1970’s music fan!)

I cut across the little park on the corner of X Street and my joggers get wet from the grass.  The Bird of Paradise flowers catch my eye and a few spiders’ webs in the neighbour’s garden are glistening with rain.

I am home and it’s time for a cup of tea!


[1] Glass that gets washed up onto the beach and has been made smooth and translucent by the action of the sand and waves.


A Win-Win!

I’m a bit of a research study enthusiast and this study combined a few things I like to do, walk, take photos and write! In addition to that I was helping someone out so it contributed to my happiness! Doing good for others boosts your mood! As I said I have not seen the student’s finished work or even really understand the purpose of her study. However, having to stop and think about how I interacted and experienced nature in my urban setting was interesting and made me feel a real sense of connectedness.

Apart from this study I am also participating in a two long term health studies. One called the 45 and up study which has a long questionnaire every 5 years; and another 3 year study on dementia and lifestyle which has frequent questionnaires which alternate between eating and exercising habits. Once each year there is a comprehensive set of cognitive and memory tests.

I have also just done a five week stint being a “patient” for a trainee medical professional to assist them with their tele-health skills.

Being a writing frugalist, I wasn’t going to “waste” an extended piece of my own writing without including it here! It was a win-win! She got some observations for her research: I got a blog post! (Maybe 2 more if I publish the others!)