Erzurum Aşkale Spring Saltworks are among the best-documented natural spring-salt production sites in the upper Karasu River basin. The site combines Miocene evaporite geology with a large historical evaporation-pond system.
Karasu Valley Setting
Aşkale lies in a high-elevation valley system connected to the Karasu, one of the main headwaters of the Euphrates. Mountain recharge, valley sediments and faulted sedimentary rocks influence groundwater circulation.
Where groundwater encounters soluble evaporites, it can become saline before returning to the surface.
Miocene Evaporites
The original Turkish article associates the saltworks with Miocene evaporitic units. These salt-bearing sedimentary layers provide the geological source of dissolved minerals in the spring water.
Spring-salt production is therefore different from direct rock-salt mining even when the brine ultimately derives from subsurface evaporites.
123 Evaporation Ponds
Historical documentation records approximately 123 evaporation ponds. A pond system of this scale allowed saline water to be managed in stages and increased the surface area available for solar evaporation.
Production depended strongly on warm, dry weather; improvements to infrastructure could extend or stabilise the working season.
Traditional Production and Rural Economy
Brine was transferred to shallow ponds, concentrated by natural evaporation and harvested after crystallisation. The activity provided seasonal employment and added value to a naturally saline water resource.
Aşkale is part of the Türkiye Spring Salt Atlas.