asymmetry of the oscillation causes the bed forms to shift laterally at non-negligible rates. I will unofficially term cross stratification of this kind climbing-bed-forms cross stratification. Bed forms are said to climb when there is overall aggradation of the sediment bed while the bed forms are moving; see a later section for details.) 502
Swahili is the most spoken language in Africa, with over 100 million speakers. It is a Bantu language believed to have originated from other languages, mainly Arabic, due to historical interactions between Arabs from the Middle East and East Africans.
Xhosa is quite a popular language, and very much a part of modern South Africa. It is spoken by 7.9 million people â thatâs 18 percent of the South African population. Thereâs even some Xhosa rap with a good amount of clicking in it. Not all clicking languages are as popular. N|uu, for instance, has only 10 remaining speakers. To be fair, it is a lot more complicated than Xhosa. Linguists spent years trying to figure out the sounds make by the speakers of N|uu.