# cryptodepression
## English
### Etymology

From crypto- (“hidden”) +‎ depression (“area lower in topography than its surroundings”).

### Pronunciation

* (Received Pronunciation) IPA: /ˌkɹɪptəʊdɪˈpɹɛʃən/
* (General American) IPA: /ˌkɹiptoʊdəˈpɹɛʃ(ə)n/
* Audio (General Australian):(file)
* Hyphenation: cryp‧to‧de‧press‧ion

### Noun

cryptodepression (plural cryptodepressions)
* (geography, limnology) The portion of a lake which lies below sea level.
** 1957, G[eorge] Evelyn Hutchinson, A Treatise on Limnology, volumes I (Geography, Physics, and Chemistry), New York, N.Y.: John Wiley & Sons, →OCLC, page 165:When the bottom of the lake lies below mean sea level, it is said to occupy a cryptodepression, the depth of which is the depth below sea level of the deepest point of the basin.
** 1975 March, Robert V. Thomann, Dominick M. DeToro, Richard P. Winfield, Donald J. O’Connor, “Section IV: Lake Ontario – Background”, in Mathematical Modeling of Phytoplankton in Lake Ontario: 1. Model Development and Verification (Ecological Research Series; EPA-660/3-75-005), Corvallis, Or.: National Environmental Research Center, Office of Research and Development, U.S. Environmental Protection Agency, →OCLC, page 8:The lake's elevation above sea level is 74.01 meters (242.8 feet) which makes its depth of cryptodepression to be 170 meters (558 feet).
** 1979 June, “Appendix A: Problem Identification”, in A Study to Determine the Feasibility of Providing Flood Control Improvements to the Susupe Chalan Kanoa Area, Island of Saipan, Commonwealth of the Northern Mariana Islands: Draft Detailed Report and Environmental Statement, Fort Shafter [Honolulu], Hi.: U.S. Army Engineer District, Honolulu, →OCLC, page A-10:The greater volume of the lake [Lake Susupe] occupies a cryptodepression (that portion which lies below sea level). Based upon a surface elevation of +2.5 ft determined on 20 December 1978 by Juan C. Tenorio and Associates' surveyors, the depth of the cryptodepression is -1.4m (4.7 ft) below sea level.
** 1988, R. B. Wood, J. F. Talling, “Chemical and Algal Relationships in a Salinity Series of Ethiopian Inland Waters”, in Hydrobiologia: The International Journal of Aquatic Sciences, volume 158, Dordrecht: Kluwer Academic Publishers, →ISSN, →OCLC, page 29; reprinted in J. M. Melack, editor, Saline Lakes: Proceedings of the Third International Symposium on Inland Saline Lakes, Held at Nairobi, Kenya, August 1985 (Developments in Hydrobiology; 44), Dordrecht: Dr. W. Junk Publishers, 1988, →DOI, →ISBN, abstract, page 29:At present there are three major closed systems (Awash R. – Afar drainage, northern rift lakes, southern rift lakes), numerous crater lakes with seepage-in and -out, and two cryptodepressions with marine inputs.
** [2012, José Galizia Tundisi, Takako Matsumura-Tundisi, “The Origin of Lakes”, in Limnology, Boca Raton, Fla.: CRC Press, →ISBN, section 3.3.10 (Average Slope (α)), page 49:The maximum depth of some lakes is below current sea level. Such lakes are called cryptodepressions. Well-known cases of tectonic lakes include Lake Baikal and the Caspian Sea. Some glacial lakes in Norway, Scotland and England are also cryptodepressions.Application of the word to the lake as a whole.]

#### Translations
### Further reading

* cryptodepression on Wikipedia.Wikipedia