Showing posts with label landfills. Show all posts
Showing posts with label landfills. Show all posts

Friday, July 19, 2019

Gobekli Tepe


Gobekli Tepe is Turkish for “Potbelly Hill”, and refers to an archeological site in the SE Anatolia Region of Turkey. The ‘hill’ is 49 ft tall and about 980 ft in diameter. It is located 2,490 ft above sea level.
The construction of this site is believed to date back to the 10th to 8th millenium BC. It was built before pottery was invented in this area, and contains massive T-shaped stone pillars, the world’s oldest known megaliths. Surveys have discovered more than 200 pillars in about 20 circles. Each has a height up to 20 ft and weighs 10 tons. They are fitted into sockets that were hewn out of the bedrock.
The 2nd phase of this site was still pre-pottery, but newly erected pillars were smaller and stood in rectangular rooms with floors made of polished lime. The location was abandoned after that.
Dating of the site was accomplished by charcoal samples found in the lowest levels of the site. It is likely this charcoal indicates the end of the active phase of occupation, and that the actual structures were older.
The site sits on a flat, barren plateau connected on the north to a neighboring mountain range by a narrow promontory that shows evidence of human impact. In all other directions, the ridge descends steeply into slopes and steep cliffs.
The pillars were carved from the plateau edges, where several quarries have been identified, and 3 t-pillars found. The largest of these has been severed from the surrounding rock, and the other 2 are identified as t-pillars, but not yet separated.
At first I thought the article was talking about something like Stonehenge; monoliths standing on end, some with a cap stone balanced atop 2 of them, but further on, the article had details that belied that thought. A large number of t-pillars were embedded in thick walls made of unworked rock that formed a circle, approximately 8 t-pillars per circle. Four of these circles have been discovered so far, with indications of another 16 not yet uncovered. It is unknown if these walled circles had a roof.
But the t-pillars were not just used in walls; in the center of each circle, 2 taller t-pillars faced each other. Stone benches were also found inside the circles. Many of the limestone t-pillars were decorated with symbols or depictions of many animals that may have been present at the time, but which no longer live in the area today. It is likely the area was forested at the time, with a large variety of animals, but millennia of human habitation and cultivation has reduced the area to a dust bowl environment.
Some of the floors of the circles were made of burnt lime, while others were bedrock.
After 8800 BC, the people stopped making circles and constructed small rectangular rooms. Rectangles are a more efficient use of space than circles, and are often associated with the emergence of the Neolithic age. However, t-pillars are still present, indicating these probably served the same purpose as the earlier circles, perhaps as a sanctuary. Several adjoining doorless and windowless rooms have floors of polished lime.
No evidence of domesticated plants or animals have been found at the site. It is assumed the inhabitants were hunters and gatherers who lived in villages part of the year. Still, very little evidence of residential use has been found. It is believed that the locations may have been used as a spiritual center even earlier than the dates given here.
So, here is a site that was created before pottery, metallurgy, writing, the wheel, agriculture or even animal husbandry. It would have taken organization of an advanced order, as it is estimated that up to 500 people would have been needed to extract and move the heavy pillars. I don’t know if that number includes the people doing the hunting and gathering to feed the people doing the heavy construction.
But around 8000 BC, the site ceased to be a ceremonial center to the people. Instead of simply abandoning the site, they deliberately filled it in with whatever rubble they had at hand, including animal and human bones. It was used for agriculture from then until the present.
It has been suggested that Gobekli Tepe was a place for remembering the dead, of putting them to rest in some way. (No obvious graves have yet been found.) It seems fitting, then, that when the Neolithic people ‘moved on’, when they invented pottery, agriculture and animal husbandry, they made an effort to bury their past.




Thursday, April 16, 2015

Waste Not, Want Not

Years ago, people started talking ‘disposable’. We became a ‘disposable’ culture, in that whenever something didn’t work anymore, we were expected to toss it and get a new one. Shall we blame NASA for that mentality? After all, every time they sent someone or something into space, they had to build a whole new rocket, new capsule, and who knew what.
I hate to blame NASA. I believe in NASA, although I sometimes chaff at how slow their progress can be.
I don’t want to blame NASA, so I blame business. It’s a conspiracy, you know. Business figures that if they sell you something you want and need, but which quickly ceases to work, you’d be back to buy another. And then another.
How long does a ball point pen work? I’m not talking about expensive pens, I’m talking about the cheap ones you buy in packages of 10 or 30, that your workplace buys by the cratefull. They don’t last long. When was the last time you put an ink refill in one? You probably don’t; you just toss it and pull out a new one. They’re cheap, and you don’t even think about it, do you?
Well, pause right now and think about the hundreds, thousands, millions of dead ball point pens taking up space in landfills. Think about what remains of each one; a drop or two of ink, a tiny bit of metal, and the rest is plastic.
One or two million drops of ink would, I assume, eventually lose its ‘moisture’ into the surrounding compost, the color components forming bits of color. Millions of bits of metal would corrode at some point, possibly forming a metallic ‘lode’ for future people to dig up and use.
But what about the plastic? What’s the half-life of plastic? What does it form, if and when it finally breaks down? From what I’ve gathered, most plastics don’t break down in landfills. Some break down when exposed to sunlight for days on end, but when they do, they form nasty toxins. There are newer, ‘biodegradable’ plastics, but they don’t degrade well in landfills, either; they degrade in compost where heat is present. So, millions of plastic pens are thrown into landfills where they will probably remain dead pens for a heck of a long time. If they do manage to degrade, they will form toxins to sicken any plants or animals that ingest them.

Long after I’m dead and gone, all those ball point pens I’ve thrown away will be out there, forming toxins. That is not the kind of legacy I wanted.