Answer:
potassium-argon dating
Explanation:
Potassium-argon (K-Ar) dating technique is the most appropriate dating method for establishing the age of a volcanic ash. It is most applicable for dating minerals and rocks more than 100,000 years old. It is based on measuring the product of the radioactive decay of an isotope of potassium (k) into argon (Ar). Since potassium is a common element found in many volcanic ash layer, the time since re-crystallization is calculated by measuring the ratio of the amount of argon 40 (Ar-40) accumulated to the amount of potassium 40 (K-40) remaining in these volcanic ashes.
The correct answer is lake titicaca
The geological terrain of this region is primarily steppe, grasslands which have poor soil for agrarian (agricultural) lifestyles. Historically, steppe people have had to rob agricultural societies (i.e. Mongols in China) or just eat meat they hunt.
Im pretty sure that it is...It is low in silica.
Hope this helps.....
