The selected area is part of the Mokrá deposit area. The deposit forms a noticeable crest stretching in the east-west direction. The north-western and the northern parts of the deposit are adjacent to the Moravian Karst protected landscape area. The Mokrá deposit here is formed by carbonaceous rocks and sialitic slate. The selected area is situated in the eastern part of the deposit and, petrografically, it is formed by local types of slate known as Rozstanské. This slate has higher compactness and has a capability to retain surface water. The Mokrá quarry is licensed for mining activity for app. 45 years. For this period, a general project of reclamation of land after extraction has been worked out. In accordance with this plan, places of extraction are reclaimed through works performed according partial projects. With regard to the type of the given part of deposit, it is recommended to realize rehabilitation in places with rocky grounds by successions. In places adjacent to the forest cover, it is recommended to restore the forest, and in places with rock formations with impermeable properties such as above mentioned slates, it is possible to form lakes and wetlands. The mining area adjoins with two Natura 2000 Special Protected Areas (Moravian Karst I and Sivicky Forest). There are 9 elements of Europe-wide significance registered within the mining area. Within the Territorial System of Ecological Stability the central line of the transregional biocorridor K 132 leads in the close vicinity of the small retention lake. From the phytogeographic point of view, the locality in focus is situated in the phytogeographic subdistrict of Pannonian thermophyticum (Pannonicum) in the phytogeographic district No. 16 – the Znojemsko-brněnská upland.
The area of a retention lake is lined partly by reclaimed slopes with connected vegetation represented by acidophilic plants. The land here has obviously been covered by overburden with low representation of calcium ions. The arboreal vegetation consists mainly of groups of Pinus nigra), Betula pendula, Betula pubescens, here and there Corylus avellana, Quercus petrea, and Acer pseudoplatanus.
List of species: The following list contains species identified in this locality during mapping on 16/ 8/ 2012: green bristlegrass - Setaria viridis (L.) P. Beauv., European black pine - Pinus nigra J.F. Arnold, mountain pine - Pinus mugo Turra, silver birch - Betula pendula Roth, European white birch - Betula pubescens Ehrh., common self-heal - Prunella vulgaris L., sessile oak (drnák) - Quercus petraea (Mattuschka) Liebl., viper's bugloss - Echium vulgare L., hawkweed oxtongue - Picris hieracioides L., woodland strawberry - Fragaria vesca L., sycamore maple - Acer pseudoplatanus L., European hawkweed - Hieracium sabaudum L., ribwort plantain - Plantago lanceolata L., wild basil - Clinopodium vulgare L., yellow sweet clover - Melilotus officinalis (L.) Pall., stinging nettle - Urtica dioica L., red fescue - Festuca rubra L., wild liquorice - Astragalus glycyphyllos L., dyer's greenweed - Genista tinctoria L., broadleaf helleborine - Epipactis helleborine (L.) Crantz, Kentucky bluegrass - Poa pratensis L., hazelnut tree - Corylus avellana L., wild carrot - Daucus carota L., tall oat grass - Arrhenatherum elatius (L.) P. Beauv. ex J. Presl et C. Presl, common wormwood - Artemisia vulgaris L., spear thistle - Cirsium vulgare (Savi) Ten., coltsfoot - Tussilago farfara L., Carline thistle - Carlina vulgaris L., heath speedwell - Veronica officinalis L., milfoil - Achillea millefolium L., white bedstraw - Galium album Mill., bird's-foot-trefoil - Lotus corniculatus L., curly dock - Rumex crispus L., black medic - Medicago lupulina L., st. John's wort - Hypericum perforatum L., wood small-reed - Calamagrostis epigejos (L.) Roth, bitter fleabane - Erigeron acris L., sweet scabious - Stenactis annua (L.) Nees, smooth vetch - Vicia tetrasperma (L.) Schreb., creeping Jenny - Lysimachia nummularia L., bugleweed - Ajuga reptans L. 1b.