Mar Chiquita (in Spanish literally "Little Sea") or Mar de Ansenuza is an endorheic salt lake located in the northeast of the province of Córdoba, in central Argentina. The northeast corner of the lake also extends into southeastern Santiago del Estero Province. It is the largest of the naturally occurring saline lakes in Argentina. The lake is located in parts of five departments in the two provinces.
The lake occupies the southern part of a depression that measures about 50 miles/80 km (north–south) by 28 miles/45 km (east–west). Its surface area varies considerably, given its shallow depth (about 10 m), and ranges between 2000 and 6000 km² (1242 and 3728 mi²).
Mar Chiquita is fed primarily by the saline waters of the Dulce River, coming from Santiago del Estero in the north after being joined by the Saladillo River. The lands around the lower course of the Dulce and Mar Chiquita are wetlands, populated by a large biodiversity (especially aquatic birds). From the southwest the lake receives the flow of the Primero/Suquía and the Segundo/Xanaes rivers, as well as several streams; these inflows vary greatly from dry to rainy seasons. The salinity of Mar Chiquita is quite variable, with measured extremes ranging from 250 g/l in times of low water levels to around 40 g/l in very humid years, such as in the decade following 1977, when record rainfall flooded much of Miramar, Córdoba.
Mar Chiquita is a coastal lagoon in the southeast province of Buenos Aires in eastern Argentina. It is located by the Atlantic coast, 30 km north of Mar del Plata.
The area is a natural reserve where a number of animal species live around Mar Chiquita. There is a small resort on the southern side of the lagoon with population of 487 people as of 2010.
The location was also used as a suborbital launch site at coordinates 37°45' South, 57°25' West between 1968 and 1972; eight sounding rockets of the types Arcas, two rockets of the type Orion-1, and a rocket of the type Dragon, were launched from the site.
Coordinates: 37°40′40″S 57°30′00″W / 37.67778°S 57.50000°W / -37.67778; -57.50000