How do gravestones tell us weathering rates?
“The weathering rates of gravestones are an indication of changes in the acidity of rainfall between locations and over time,” Guertin said. … Calcite is a carbonate mineral, and so it reacts with any acid, including the weak rainfall acids, and dissolves.
What causes headstones to sink?
Headstones have a tendency to sink into the ground and become overgrown with grass. This is because these grave markers can weigh 100 pounds or more. This causes the gravestones to sink further and further into the ground as time goes on.
Which types of gravestones would you expect to be the most resistant to weathering?
Quartzite would be highly resistant to chemical weathering because it’s quartz. And because it lacks a lot of space for water to sneak in, very resistant to physical weathering as well. Make your tombstone out of quartzite and you’re looking at a rock for the ages.
What factors might influence the rate of chemical weathering of gravestones?
What factors might influence the rate of chemical weathering of gravestones? Rainfall and temperature can affect the rate in which rocks weather. High temperatures and greater rainfall increase the rate of chemical weathering.
What happens when rainwater weathers the gravestone?
Minerals in rocks may react with the rainwater, causing the rock to be weathered. … When acidic rainwater falls on limestone or chalk, a chemical reaction happens. New, soluble, substances are formed in the reaction. These dissolve in the water, and then are washed away, weathering the rock.
What causes a grave to collapse?
Wooden coffins (or caskets) decompose, and often the weight of earth on top of the coffin, or the passage of heavy cemetery maintenance equipment over it, can cause the casket to collapse and the soil above it to settle.
What soil do you put on graves?
Topsoil is OK for growing most things, although some plants will prefer acidic soils and some will prefer alkaline soils.
What type of chemical weathering is enhanced by acid rain?
Dissolution: Dissolution (a type of chemical weathering) occurs when minerals are dissolved by reactions with acids in the environment (acids such as carbonic acid in water; humic acid in soil, and man-made acids, such as sulfuric acid in rain).
Which three minerals are especially susceptible to oxidation?
Oxidation and hydration: Oxidation produces iron oxide minerals (hematite and limonite) in well aerated soils, usually in the presence of water. Pyroxene, amphibole, magnetite, pyrite, and olivine are most susceptible to oxidation because they have high iron content.