Could the rocks whisper tales of ancient times? Here at Lom v Dubči, they certainly seem to. Lom v Dubči, nestled between Dubeček and Dubí, offers a glimpse into Prague’s geological and human past. This nature reserve, part of the Říčanka Natural Park, isn’t just a pretty sight. It’s a protected area showcasing a fascinating geological profile. The site consists of two abandoned quarries on the right bank of the Říčanský potok (Říčanský stream).
Lom v Dubči reveals distinct layers of rock. These layers tell a story of a shifting Ordovician sea. The prominent Řevnice quartzite, formed in a deep, calm environment, stands as a testament to this ancient ocean. Later, tectonic upheavals, evidenced by the M-shaped fold in the smaller quarry, dramatically reshaped the landscape. The quartzite, however, withstood these powerful forces. Look closely, and you can see where younger sandstone and conglomerates from the Cretaceous period rest upon the older quartzite. This unconforming contact signifies a period of uplift, erosion, and subsequent deposition. These younger rocks tell of freshwater lakes existing before the area was submerged by a later sea. Horizontal tectonic striations within the quarry further detail this turbulent geological history.
Lom v Dubči’s quartzite provided a valuable resource. The durable stone was used for paving stones and road construction, shaping the very streets of Prague. Remnants of this quartzite legacy can still be found in some parts of the city. The ecological story of Lom v Dubči is just as fascinating. Resilient plants cling to the rocky outcrops, evidence of a once-thriving heat-loving community. Notice the hardy fescue, a dominant species that thrives on the sunny slopes. The slopes also harbor communities of rock debris and deeper-soil grasslands. Look for the colorful blooms of meadow oat-grass, wood small-reed, and the unique presence of Pannonian madwort. The area’s fauna is also noteworthy. While mainly inhabited by species common to dry pastures, Lom v Dubči also provides a haven for amphibians, reptiles, and various bird species, seeking refuge from the surrounding agricultural lands. You might even spot a magpie or a long-eared owl.
Lom v Dubči stands as a precious testament to Prague’s rich history. It’s a place where the whispers of ancient seas, tectonic forces, and human endeavor intertwine, creating a unique and captivating narrative. The ongoing conservation efforts here strive to maintain this delicate balance, preserving Lom v Dubči for future generations to explore and wonder.