path along the foot of the massif and dips toward the interior of the valley. The river is on the western side. From it the scarps of the footwall of the Sparta Fault are visible at the base of Tayegetus. Taygetus is transected by deep ravines through which tributaries flow into the Eurotas. At the foot of the massif is a zone of scree. To the east of that alluvial fans from Taygetus cover half the valley, making it asymmetrical. On that account it is often called the Evrotas Furrow. The Eurotas flows over a flood plain and also through a shallow aquifer of sand and gravel 10–60 m deep, graded with the deep end downstream. The gradient of the aquifer is a steep 1–3%. The highest hydraulic conductivity and transmissivity are near the junction of the Xerias and the Eurotas south of Sparti. To the east are older and finer sediments of alternating clay and marl beds, some of which are impermeable. Under the entire valley is a deep aquifer in the limestone floor, containing water permeating downward through the horsts. The Eurotas collects runoff and drains the deep aquifer on the east bank but loses water to the shallow aquifer on the west bank. Recent geologic history Analysis of bore holes in the valley indicate that in the Pliocene it was a lake. In classical times, according to the ancient authors, it was swampy, but the cultivatable land exposed was very fertile. Then, as now, it was used mainly for fruit trees, especially olive. Geologic analysis done in the 20th century hypothesized that the Eurotas Valley in the Late Pliocene was an inland sea over the lower and middle valley several hundred m deep at the current mouth of the river. The fault-block geology had developed earlier. During the Pleistocene the sea level dropped exposing a flat floor. Continued slippage along the Sparta Fault dropped the middle Eurotas valley further forcing the river to cut its way through the 100–250 m hills dividing the lower from the middle valley, creating Eurotas Ravine. Notes Bibliography . External links Landforms of Laconia Rivers of Greece Rivers of Peloponnese (region)