sign in a cave in Laos

25 July 2017

Study on snails in Perak

Lafarge Malaysia, who are quarrying Gunung Kanthan (see labels), provided a grant to scientists from Rimba and Universiti Malaysia Sabah to study land snails on 12 limestone hills in Perak. See Rimba for more on this.

The results were published in ZooKeys 682 on 4 July 2017, Diversity and biogeography of land snails (Mollusca, Gastropoda) in the limestone hills of Perak, Peninsular Malaysia, by Junn Kitt Foon, Gopalasamy Reuben Clements, Thor-Seng Liew. The results are very interesting, on 12 hills -
"We found 122 species of land snails, of which 34 species were unique to one of the surveyed hills. We identified 30 species that are potentially new to science. The number of land snail species recorded at each hill ranged between 39 and 63 species.".

This is quite exciting, lots of potentially new species.

The study also reveals that "Charopa lafargei which previously presumed as endemic to Gunung Kanthan (Vermeulen and Marzuki 2014), is shown in our study to also occur on the limestone hills at the north of Kinta Valley".

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Over the years I have collected a few snails from limestone areas. This one is common all over Peninsula Malaysia -
Amphidromus atricallosus perakensis (Fulton, 1901)

See more on my blog Some snail shells from Pahang and Perak limestone.

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11 July 2017

LafargeHolcim accelerates biodiversity efforts in Southeast Asia

My blog in June 2014 reported that Cement giants Lafarge and Holcim would merge. The merger happened in July 2015.

Lafarge is the company quarrying Gunung Kanthan - see labels about this.

On 11 July 2017, LafargeHolcim published an article, " LafargeHolcim accelerates biodiversity efforts in Southeast Asia".  See link for the full article. Although Gunung Kanthan isn't specifically mentioned, it does relate to Malaysia. Excerpt from first paragraph:
"LafargeHolcim is accelerating its efforts on biodiversity conservation and has signed an agreement with Fauna & Flora International (FFI), a leading NGO focused on biodiversity. Under the agreement, FFI will perform an independent external review of the Group’s existing biodiversity management plans (BMP’s) at sites in Malaysia, Indonesia and the Philippines; contribute to the development of a Groupwide strategy on karst management since karst areas are an important habitat for unique and specialized fauna; identify opportunities for enhancing biodiversity in quarry rehabilitation; and organize a stakeholder dialogue bringing together an external expert group, local government, local NGOs and LafargeHolcim staff to consult on BMP recommendations."

17 May 2017

Penang Woman dated at 5710 years old

Although not cave related, I am posting it as it is archaeological and refers to human remains.

Human remains were found when the area was dug up to lay the foundations for the Guar Kepah Archaeological Gallery, Kepala Batas, near the Penang-Kedah border, about 28km from Butterworth. The bones were found in April 2017 and radiocarbon dated in the US, giving an approximate age of 5710 years. Further samples have been sent to Denmark and will take 6 months for results.

The sex of the bones isn't confirmed, but they have been called "Penang Woman".

Read more on The Star 13 May 2017.

27 January 2017

Gomantong Caves 3D Model fly through

A stunning fly through of Gomantong Caves


Published on Oct 12, 2013          
Standard YouTube License
This work is the preliminary product of an international collaboration of cave scientists which combines state-of-the-art laser scanning with aerial  drone photogrammetry. More details at: http://faculty.jsd.claremont.edu/dmcfarlane/Borneo/index.htm

Gomantong Caves 2012 with gatewing and faro 3D scanner


Borneo - survey Gomantong Caves 2012 with gatewing and faro 3D scanner

https://www.youtube.com/watch?v=FIaoWjeH7TM&feature=player_detailpage#t=340


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Gomantong Caves in Borneo, overview of the 3D scan reconstruction
https://www.youtube.com/watch?v=eVhPadSFZ-U



3D laser scanning in Kota Gelanggi

In Nov 2014 I joined the UTM team for 3D scanning in a cave at Kota Gelanggi. In 2009 I had joined their scanning team at caves in Lenggong, Perak.

The caves at Kota Gelanggi in Pahang are quite well known as some are open to the public. There is an entry fee of RM5.



It is now called a Cave Heritage Park but was deserted when we went there. As the others didn't know the caves, I suggested we do the scanning in Gua Terang Bulan . To get there we drove through Gua Jin (aka Gua Tongkat).


I had attended the official opening of Gua Terang Bulan as a show cave in 1998. The (56) stairs up to the cave were somewhat overgrown and also partly blocked by a fallen tree. There was quite a lot of heavy equipment to carry - the new Faro scanner "only" weighs about 20 kg !


The cave is gated -

44 steps lead down into the main passage -


There is/was electric lighting in the cave, though judging by the state of things and the generator outside, I doubt if the lights still work. The fixtures and fittings, walkway etc were all in terrible condition. Many of the handrails were broken and the debris just lying on the floor, including many light bulbs. Such a pity.



Fungi on a handrail -

We went through the cave to the end. A generally flat passage leads via steps into another long level passage



There are a few nice formations in the cave and some not so nice graffiti.



This is probably a survey station left by the Museums Dept when doing archaeological work

The passage goes up steeply into the final chamber. Steps go half way up into this chamber that is partly lit  by daylight. This is where we started scanning.

Preparing the 16 marker balls for the scanning



Getting the scanner set up -



Each scan takes 7 minutes. During this time we had to sit in total darkness. After a few scans, I went ahead and out of range of the scanner and spent time looking for cave fauna.


Web spiders , including Psechrus -




Long legged centipede, Thereupoda -

Crickets



Whip spider -

Snails, probably Subulina octona -



There were a few insect eating bats in the cave and many dead ones. Bat skeleton -






Unidentified bones -

Bird feathers -

I was quite intrigued by these burrowing spiders. There is a spider in every hole in this photo -



There were also crickets waiting by some of the burrows, but I don't know the reason. They all jumped away before I was able to get any photos. I was unable to get the spiders identified, they could be a burrowing species of wolf-spiders ( Lycosa sp.), or maybe Damarchus or Atmetochilus. There was a lot of insect debris by some of the holes, e.g. cockroach wings etc.

Roots coming into the cave

Some formations

In places the formations are starting to break down

The results -


For more on scanning techniques, see the Lenggong blog.


See also counting bats through scanning in Gua Kelawar, Langkawi, also scanning in Bau caves.

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© Liz Price
No reproduction without permission