@article {2607,
	title = {On the Age and Origin of Lake Ejagham, Cameroon, and Its Endemic FishesAbstract},
	journal = {Quaternary Research},
	volume = {895716332765461461671825961727356647223},
	year = {2018},
	month = {Jan-01-2018},
	pages = {21 - 32},
	abstract = {Lake Ejagham is a small, shallow lake in Cameroon, West Africa, which supports five endemic species of cichlid fishes in two distinct lineages. Genetic evidence suggests a relatively young age for the species flocks, but supporting geologic evidence has thus far been unavailable. Here we present diatom, geochemical, mineralogical, and radiocarbon data from two sediment cores that provide new insights into the age and origin of Lake Ejagham and its endemic fishes. Radiocarbon ages at the base of the longer core indicate that the lake formed approximately 9 ka ago, and the diatom record of the shorter core suggests that hydroclimate variability during the last 3 millennia was similar to that of other lakes in Cameroon and Ghana. These findings establish a maximum age of ca. 9 cal ka BP for the lake and its endemic species and suggest that repeated cichlid speciation in two distinct lineages occurred rapidly within the lake. Local geology and West African paleoclimate records argue against a volcanic, chemical, or climatic origin for Lake Ejagham. Although not conclusive, the morphometry of the lake and possible signs of impact-induced effects on quartz grains are instead more suggestive of a bolide impact.},
	keywords = {Africa, cameroon, Cichlid, Diatom, evolution, Lake Ejagham, Speciation, West African monsoon},
	issn = {0033-5894},
	doi = {10.1017/qua.2017.37},
	url = {https://www.cambridge.org/core/product/identifier/S0033589417000370/type/journal_articlehttps://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589417000370},
	author = {Curt Stager, Jay and Alton, Kenneth and Martin, Christopher H. and King, David T. and Petruny, Lucille W. and Wiltse, Brendan and Livingstone, Daniel A.}
}
@article {2109,
	title = {The nature of {\textquoteright}stone-lines{\textquoteright} in the African Quaternary record: archaeological resolution at the rainforest site of Mosumu, Equatorial Guinea},
	journal = {Quaternary International},
	volume = {89},
	year = {2002},
	note = {536zcTimes Cited:15
Cited References Count:89
},
	month = {2002},
	pages = {71-96},
	abstract = {{\textquoteright}Stone-lines{\textquoteright} are widespread Quaternary features that appear in tropical and subtropical regions. They have a diverse nature and genesis, and are frequently associated with archaeological assemblages. However, archaeological deposition and {\textquoteright}stone-line{\textquoteright} configuration may be unrelated geological events separated by thousands of years. The energetics involved in {\textquoteright}stone-line{\textquoteright} formation, coarse and fine material translocation across space and in depth, and overall assemblage integrity vary from one site to another. This paper presents quantitative and spatial geoarchaeological data from the site of Mosumu, in the tropical rain forest of continental Equatorial Guinea. Mosumu yielded Middle and Later Stone Age assemblages dated to at least the last 30,000 years in a {\textquoteright}stone-line{\textquoteright} context. Special attention to the study of vertical and horizontal variations of artifacts, sedimentary features, and taphonomic indicators allows analysis of the nature, meaning, and archeological resolution at this site. The results are placed in the wider debate over the meaning of {\textquoteright}stone-lines{\textquoteright} in the African Quaternary record. (C) 2002 Elsevier Science Ltd and INQUA. All rights reserved.},
	keywords = {Age, behavior, cameroon, congo, ituri, layers, origin, tools, vegetation},
	isbn = {1040-6182},
	author = {Mercader, J. and Marti, R. and Martinez, J. L. and Brooks, A.}
}
