Video: Mammoth bone. Preservation as a function of bedding conditions. Dating of the disaster in the Yakut territory
2024 Author: Seth Attwood | [email protected]. Last modified: 2023-12-16 15:55
We will not achieve such accuracy, which is given by the Carbohydrate Analysis, but at least something..
Frozen mammoth bone is well preserved.
Having thawed out of the river bank washed out in high water, the bone from the state of the highest quality in ten years passes into the state of chips.
The classification of mammoth tusk by varieties can be found here.
The tusks are the best preserved, extracted from the permafrost, which serves as an excellent "refrigerator for tusks", in which the tusks can be preserved almost in their original form.
The tusks taken from rivers are the worst of all preserved; they usually come with a lot of cracks. If the tusk lies somewhere on the surface, it will most likely not be suitable for carving at all, since under various weather conditions with changes in temperature and humidity, the tusks are very much destroyed over time. Due to these factors, the appearance of cracks on the tusk is a natural process that is sometimes inevitable even under artificially created favorable conditions.
Having thawed out of the river bank washed out in high water, the bone from the state of the highest quality in ten years passes into the state of chips.
In products under museum conditions, the bone "bursts" a lot
The photo shows a fragment of an ivory figurine from the 13th century (France) from the Hermitage collection. Craquelure cracks are clearly visible, arising from numerous temperature changes over time.
Even in rooms with constant humidity and temperature, any bone can crack. At certain times of the year, they can appear regularly and even close back without any trace. The appearance and disappearance of cracks is almost impossible to predict and guaranteed to be prevented. It is an organic living material that responds to environmental changes. Many antique carvings are covered with a network of craquelure cracks.
But this - once again - under the right conditions.
Permafrost conditions are more than adequate:
Now consider the case with inappropriate conditions.
“I decided to plant potatoes this year, my land has not yet been developed. He plowed the ground and stumbled at the end of the first bed.
At first I thought it was a root or a tree. I decided to dig it and saw a tusk, then I noticed a second one.
Then he found a bone, as it turned out later, a humerus. The remains turned out to be very dilapidated - they crumbled upon contact,”the owner of the dacha told YASIA.
The found tusk turned out to be 270 cm long and has a root circumference of about 50 cm.
According to Prokopiy Nogovitsyn's assumption, this is the steppe ancestor of the woolly mammoth, the trogontery mammoth, 400 thousand years old.
The find, lying in the near-surface layer, which is clearly visible in the photographs, was thawed every summer.
No bone will withstand such defrosting deformations for a long time. 100, 200 years, 300, 400..
1595 is the year of the pole shift. The mammoths died.
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