1) lerd; 2) lerd andâxtan, lerd oftâdan, lerdidan
Fr.: 1) dépôt, gisement, lie, tarte; 2) déposer, se déposer
1a) Something precipitated, delivered and left, thrown down, or accumulated,
as by a natural process.
From L. depositus, p.p. of deponere "to lay aside, put down," from → de- "away" + ponere "to put," → position.
Lerd "sediment, tartar of wine," probably a variant of dord "dregs, lees, sediment, tartar of wine."
The process by which water vapor changes directly to ice without first becoming a liquid. This is how snow forms in clouds, as well as frost and hoar frost on the ground. The opposite of deposition is → sublimation. → condensation.
M.E., from O.Fr. deposition, from L. deposition- "putting aside, testimony, burial," from deposit(us) "laid down," p.p. of deponere "to put down," from → de- + ponere "to put, place."
Vâneheš, from vâ-→ de- + neheš verbal noun of nehâdan "to put, place," Mid.Pers. nihâtan, O.Pers./Av. ni- "down; into," → ni-, + dā- "to put; to establish; to give," dadāiti "he gives," cf. Skt. dadâti "he gives," Gk. didomi "I give," L. do "I give;" PIE base *do- "to give."
North Polar Layered Deposits (NPLD)
Lerdhâ-ye Laye-laye-ye Qotb-e Hudar
Fr.: couches de dépôt du pôle nord
A large area of the north polar region of Mars which is covered with alternating layers of water ice and dust. → South Polar Layered Deposits.
South Polar Layered Deposits (SPLD)
Lerdhâ-ye Laye-laye-ye Qotb-e Daštar
Fr.: couches de dépôt du pôle sud
A large area of the south polar region of → Mars which is covered with layers of → water ice and → dust. The SPLD, like the NPLD, has a maximum relief relative to the surrounding terrain of ~ 3.5 km and ~ 1,000 km across. Above the SPLD lies a very thin temporary (1-10 m) cap of → carbon dioxide ice/frost that snows out in the winter and sublimates over the spring and summer seasons. It is believed that the rhythmic nature of the deposits is related to oscillations in Mars' → orbital parameters (J. J. Plaut et al., 2007, Science 316, 92).