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.
The grassfields languages originally stem from Congo Niger languages, which are one of the largest language families in the world. The most widely spoken Congo Niger languages by number of native speakers are Yoruba, Igbo, Fula and Shona and Zulu. The most widely spoken by total number of speakers is Swahili. Most of the Niger-Congo languages have prefixes and suffixes to qualify nouns and verbs as well as words that agree with them.