Showing posts from December, 2020

What are the Grounds for Building with Mud?

I visited Van Clothier in Silver City in December, 2020 as he was nearing completion of his house in Silver City that uses a form of puddled adobe construction called "cob." The word cob comes from an Old English root meaning "a lump" or "loaf." It's a traditional building technique using hand formed lumps of adobe (earth mixed with sand and straw). Self-supporting, load-bearing adobe walls are built by adding lumps of the cob, one handful at a time, creating a layer that you smooth out as you go. You build one layer on top of another, typically as much as one-foot high per day, until the walls have reached their full height. There's no need to put the adobe into forms and create bricks that first have to be dried in the sun. Since a cob building is one monolithic unit reinforced by straw, it has no weak straight-line mortar joints, making it stronger than brick or block. Walls can be curved and tapered to make them even stronger.  Cob is very

Secret Knowledge of Water

  The moon was just rising as we selected a campsite on the floor of the Chihuahuan desert near Cooke's Peak, on the horizon at right. We were 50 miles north of the border with Mexico. We started a campfire immediately as the temperature started to plummet into the low teens on one of the last evenings of December. The next morning we took a stroll in the hills above our campsite. We headed into this draw to see if there were any signs of water. We found bleached bones, and plenty of thorny mesquite and ocotillo shrubs. Then we dropped into a crease in the land, not yet warmed by the morning sun, and found isolated pools where running water had stripped off the topsoil, exposing bedrock. The miracle of water in the desert. Encouraged, the next day we decided to go looking for a cold water spring that was supposed to be in a drainage above Faywood Hot Springs. Running water appeared to be a rare event here. But the tops of tall cottonwood and willow trees, visible to us in the dista

Window Rock: Portal Through a Volcanic Ridge

Window Rock is a hole that formed in a volcanic wall on a ridge in the foothills of the Jemez Mountains in the Santa Fe National Forest. Look carefully and you can see the Window Rock hole in a wall of black-colored volcanic rock. The rock wall extends to the right side of this photo. Another ridge topped by a wall of volcanic rock is behind it, on the far right. These volcanic walls formed between 8 and 10 million years ago when lava erupted on Lobato Mesa, the highest ridge in the background. The lava rose up underground through vertical cracks and cooled there before it could erupt on the surface, forming these walls. They are now above ground where we can see them because the softer earth that covered them has been eroded away. The lighter colored pink hills around it are remnants of a massive field of sand dunes that formed here earlier, between 10 and 14 million years ago, when sand was blown in from southwest. Over time these sands hardened into the hills of Ojo Caliente Sandst