Southern Sojourn 2023(6): Two Visits to Gemstone Beach, Friday & Monday 27 & 30 January

This Post covers my second and third fossicks on Gemstone Beach since I arrived in Riverton Aparima on 21 January (see here for the first Post in this Series). On Friday, I undertook a careful fossick for three hours, venturing a few hundred metres west of the Waimeamea River mouth. The river mouth is over a kilometre from the carpark and I usually try to reach it when fossicking.

The following are some of my finds from Friday, including an unknown stone, a banded argillite and a handful of hydrogrossular garnets.

On Monday, I spent a further four hours fossicking on Gemstone Beach, walking well past the Waimeamea River mouth (see photos at top of Post). It was a warm day though cloudy. I found a number of intriguing stones. One of them is a brecciated stone, with tiny cubic crystals of pyrite in it. Another is a banded argillite that has undergone a bit of stress:

A range of different coloured amygdaloidal stones can be found on Gemstone Beach. Here is one, along with what is maybe a green quartzite:

Some of the other stones I collected on Monday:

The next Post in this Series describes another fossick on Gemstone Beach. The Index to the Series is here.

Southern Sojourn 2023(5): Slope Point, Two Visits, Monday & Tuesday 23 & 24 January

Slope Point is the southernmost tip of the South Island. It lies 115 kilometres east of Riverton Aparima. Tracey Kidd and I went there on these two days, meeting up both times with Oliver Simpson who kindly drove us to two of the Point’s fossicking beaches. One beach in particular proved very productive on the Monday.

I particularly like many of the interesting rhyolites and volcanic brecciated stones that can be found on these beaches. Pieces of petrified wood are often there, especially of the black variety, though it is the lighter coloured ones that are most attractive. I still find that I can’t identify many Slope Point stones with any certainty, but I don’t need to for them to be excellent for tumble polishing.

Among the rhyolites I found were some colourful ones and some orbicular ones:

Some of the rhyolites have interesting patterns in them:

Among the volcanic brecciated stones (and similar) I collected were these:

A gorgeous piece of light-coloured petrified wood with some agate in it, about 2 cm long:

The final four stones have some interesting and unusual features.

The first Post in this Series is here. Two further fossicks on Gemstone Beach feature in the next Post. The Index to the Series is here.

Southern Sojourn 2023(4): First Fossick at Gemstone Beach, Sunday 22 January

I arrived yesterday at my new base in Riverton Aparima. The fossicking I did on my trip south is covered in Posts starting with this one. This morning, Tracey Kidd and I spent two and a half hours fossicking on Gemstone Beach.

One particular stone I found stood out due to its bright colours.

However, this red amygdaloidal stone rivals it for attractiveness.

A small hematite orbicular jasper, also known as a poppy jasper, was another of today’s outstanding finds.

Six more of the stones I collected:

The next Post in this Series looks at stones found during two visits to Slope Point. The Index to the Series is here.

Southern Sojourn 2023(3): The Trip South – Friday 20 January, Kakanui

Day Three of my trip south from Whanganui, on my way to Riverton Aparima, was spent mainly on Kakanui’s Seadown Beach. (Day One is covered in this Post.) I had done a 30 minute fossick on Thursday night upon arriving in Kakanui. Then, with Tracey Kidd, I did another two fossicks today, spending about five hours on the beach. The stones in this Post come from those three fossicks.

I was lucky enough to find a type of stone I had become aware of last year, one full of tiny fossils. A Scottish rockhound, John Taylor, had noted on my previous find that it was “similar to a Danish Fossil Okkergelber Hornstein made up of bryozoan”. It is only by looking closely at it that the tiny fossils can be seen.

Again I found a number of quartzites, one of them being quite stunning, with unusual circular features. Here are three quartzite finds:

Another two quartzites, one being a yellow one with an unusual white patch, the other being brecciated in part:

Four other stones I found today:

My next fossick, two days later, was at Gemstone Beach, Orepuki, Southland. An Index to the “Southern Sojourn 2023” Series is here.

Southern Sojourn 2023(2): The Trip South – Thursday 19 January, Timaru South

This was Day Two of my trip south from Whanganui, on my way to Riverton Aparima. Day One is covered in this Post. In the late morning of Day Two I stopped at Timaru South before continuing on to Kakanui where I stayed for two nights. Just south of Timaru city, I spent 2 1/4 hours walking north from the end of Scarborough Road. I walked past the ruins of the wharf (there is another further on, I noticed) to the end of the recently built floodbank which protects the railway line.

Among the stones I look for on this beach are jaspers and green quartzites. I found a large hematite jasper here in March 2022 (see the end of this Post) which I gave to Tracey Kidd to polish (she did a great job with it). Today I found a similar but smaller hematite jasper, as well as a few other jaspers.

Different coloured quartzites can be found on this beach. But it is the green ones that I find the most attractive. Here are four I collected today.

I found three porphyry stones similar to a type of stone I have found at Kakanui, 100 kms to the south. The Kakanui one is darker – see this Post – and a UK rockhound noted it was very similar to a rhomb-porphyry from Norway.

I then drove a couple of kilometres to the southern end of this beach, at the end of Ellis Road, where I met up with Tracey Kidd from Christchurch in her campervan. After we spent some time fossicking there, we drove to Kakanui. I had a brief early evening fossick at Seadown Beach as Tracey didn’t arrive until later. The next day, we spent some serious fossicking time there (see the next Post in this Series – the Index to the whole Series is here).

Southern Sojourn 2023(1): The Trip South – Wednesday 18 January, Ward Beach and Leithfield Beach

I have been able to arrange an accommodation base in Riverton Aparima in Southland for a few weeks, possibly a few months. This means my tumblers have become silent and my focus has turned to fossicking once again, after six months spent at home. I crossed Cook Strait by ferry on Tuesday 17 January, spending the night at Ward. The next morning, I drove out to Ward Beach, spending just under two hours there. As it is the height of the summer holiday season, quite a few campers were located at the ground at the back of the beach. A few large vehicles for launching boats were also at the back of the beach. The day was cloudy, with low clouds hiding the tops of the hills. I decided to cross the Flaxbourne River and walk southwards as I had not been down that way previously. This will give me an opportunity to collect information about this area to add to the TumbleStoneTwo page on Ward Beach.

At this time of the year, the Flaxbourne River has only a very light flow. Last time I was here, in July 2022, the river had been in flood, and the beach was piled high with forestry slash and the water was heavy with silt.

Easily wading the river’s trickle today, with the beach being clear of the slash, I passed a seal sunbathing on nearby rocks. The beach to the south initially contains a lot of rocks on the seaward side of the pebbly beach, with pockets of stones sometimes lying in-between the rocks. Jagged outcrops of limestone thrust up through the sand and pebbles. Then there is a long sweeping beach, at the end of which is Needles Point. The Needles are a spectacular coastal limestone outcrop about three kilometres south of Ward Beach (another is Chancet Rocks to the north).

Among the stones found during my fossick were a few with agate in them. In this stone, the agate has filled holes in what I think likely is limestone.

The following type of agate-veined limestone pebble can also be found on Ward Beach. Below it is a veined limestone pebble where agate is not apparent.

At one point on the beach, there was a white rock about 35 cm long with some agate veins. This contrasts in size to a small white and black pebble I found, about 2 cm long.

There is a great range of limestone pebbles here of different colours and textures. Many of them contain zoophycos trace fossils (see here).

Two other stones I found today – the first is maybe brecciated limestone, 4 cm long, and the second a granite or basalt porphyry, containing feldspar crystals, that is about 6 cm long (for more information on the second type of stone, see Stone #2 in this Post).

A drive of just over three hours then took me 230 kms south to Leithfield Beach in Canterbury, just north of Christchurch. I know fossickers have found petrified wood and interesting jaspers here. I often drop in on this beach on my way past, though it has not proved very productive for me (except the day I found five pieces of petrified wood – see “L” is for “Leithfield Beach Petrified Wood” in the second part of this Post). Today, I decided to visit the section of beach just a little south of where I normally go, spending an hour there. I parked near the community hall and public toilets.

I find it difficult to find a stone on Leithfield Beach that is not pitted or has chunks taken out of it. However the jaspers can be irresistible. Here are four of the jaspers I found.

Next stops, next day, will be Timaru South and Kakanui’s Seadown Beach. See this Post for my fossick at Timaru South. The Index to the whole Series is here.