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September 8, 2015

Syndey Sandstone

Back in March and April 2015 my husband and I travelled to Australia for a couple of weeks for vacation. We went to visit some good friends who live in Sydney. We spent most of our time in Sydney and some of the surrounding areas, such as the Blue Mountains. We also spent a few days up in the Port Douglas area, including a couple of days on a boat …

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July 27, 2015

Monday Geology Picture: Cross-Bedding Sandstone Bench, Sydney, Australia

Goodness, I’ve been busy recently! I’m afraid that my blogging has been quite neglected… as it has been for the past few months. However, things have finally calmed down a little now, so I’m going to make an effort over the next few weeks to share some geological pictures from some of my recent travels… and also possibly from some travels in 2014 that I neglected to blog about. I’ll …

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June 29, 2015

Monday Geology Picture: The Three Sisters, Blue Mountains, Australia

This week’s Monday Geology Picture was taken during my recent vacation in Australia. One day my husband and I drove outside of Sydney to spend some time exploring the Blue Mountains. One of the tourist attractions that we visited is a lovely rock formation known as The Three Sisters. This rock formation was carved (by erosion) out of ~250 million year old sandstone.

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April 13, 2015

Monday Geology Picture: Sydney Sandstone Building Stones

During my recent travels in Australia, I noticed quite a bit of sandstone around Sydney. Therefore, I was not particularly surprised to also see quite a few sandstone building stones around the city. For example, the stones shown in the above picture, which shows part of a bridge in North Sydney. By the way, I’m back home in South Africa now and won’t be travelling for a little while. So, …

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April 6, 2015

Monday Geology Picture: More Sydney Sandstone

I’m still in Australia at the moment but will be home in a few days. I’m looking forward to writing up a few blog posts about some geological sights in Australia once I’m back home. For now, though, here’s a picture showing another beautiful example of sandstone in the Sydney area. This picture was taken at the Sydney Zoo. The red and orange colors are a result of iron oxidation. …

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March 30, 2015

Monday Geology Picture: Cross-Bedding Near Bondi Beach, Australia

I’m visiting Australia at the moment and will have a few blog posts to write up once I’m back at home. For now, though, here’s a sneak peek at some geology in Sydney. I took this picture close to Bondi Beach. There are some lovely exposures of sandstone outcrops near the beach.

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June 18, 2011

Geology Word of the Week: C is for Coquina

Coquina rock. Image taken from wikipedia here. def. Coquina (“co-keen-ah”):A sedimentary rock consisting of loosely-consolidated fragments of shells and/or coral. The matrix or “cement” consolidating the fragments is generally calcium carbonate or phosphate. Coquina is a soft, white rock which is often used as a building stone. Coquina forms in near-shore environments, such as marine reefs. According to the Oxford English Dictionary, coquina is a loanword from Spanish meaning “shell-fish” …

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