Solonchak (Russian and Ukrainian: Солончак) is a Reference Soil Group of the World Reference Base for Soil Resources (WRB). It is a pale or grey soil type found in arid to subhumid poorly-drained conditions. The word is Russian for "salt marsh", which is in turn from the Russian sol (соль) "salt". The Ukrainian folk word "солончак", which in turn from Ukrainian "salty" (солоний) + "чак"—suffix; designation of an object that has the property. A village with the name Solonchaky exists in Ukraine.

• Chott
• Solonetz
• Takir
• Salt pan
• Sor (geomorphology)

• IUSS Working Group WRB: World Reference Base for Soil Resources, fourth edition. International Union of Soil Sciences, Vienna 2022. ISBN 979-8-9862451-1-9 ([1]).

• W. Zech, P. Schad, G. Hintermaier-Erhard: Soils of the World. Springer, Berlin 2022, Chapter 8.3.5. ISBN 978-3-540-30460-9

• profile photos (with classification) WRB homepage
• profile photos (with classification) IUSS World of Soils