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The name Jēkabpils whispers of history, of a city born from a 17th-century duke’s decree and the steady flow of the Daugava River. Visitors come for the cobblestone streets of Krustpils, the imposing fortress, and the palpable sense of a frontier town caught between Latvian and Livonian, and later, Russian influences. But to understand this place—to truly grasp its quiet, resilient character and its unintended relevance to our planet’s most pressing crises—you must look down. You must read the story written in stone, sand, and clay beneath your feet. The geography of Jēkabpils is not just a scenic backdrop; it is an ancient archive and a starkly modern manifesto.
The city’s soul is, unequivocally, the Daugava River. Here, it is not yet the mighty waterway of Rīga’s port, but a powerful, meandering thread that has sewn the landscape together for millennia. This river is the master sculptor of local geography. Its valley, a wide, gentle depression cutting through the Eastern Latvian Plain, is the defining feature. But this valley was not carved by water alone. It was excavated by unimaginable force—the crushing weight and flow of Pleistocene ice sheets.
The entire region around Jēkabpils is a monument to the last Ice Age. As the final continental glacier, the Weichselian, began its agonizingly slow retreat northward some 15,000 years ago, it did not leave quietly. It left a chaotic, waterlogged mess known as a deglaciation landscape. This is the key to everything. The glacier dumped immense loads of sediment—clay, silt, sand, gravel, and boulders—directly on the land or into vast, ice-dammed meltwater lakes. The most prominent geological features you encounter here are not mountains, but these glacial gifts: moraines (ridges of bulldozed debris marking the ice’s pause), outwash plains (sandy flats deposited by glacial streams), and lacustrine plains (the flat, clayey beds of those ancient lakes).
Drive or hike just outside the city, and the terrain tells this story. The gentle, rolling hills are ground moraine. The patches of exceptionally fertile soil sit atop lake plains. The abundant sand and gravel pits, crucial to the local economy, are excavations into those glacial outwash deposits. This geology dictates agriculture, construction, and even the very placement of settlements. Jēkabpils itself sits strategically on a more resilient bank, likely a terrace of older sediment, safe from the river’s frequent floods that inundate the opposite, lower floodplain—a lesson in ancient climate adaptation written into the town plan.
Beneath the glacial blanket lies an even older, darker story. Drill down through the Quaternary sands and clays, and you hit bedrock that speaks of a tropical past. This is the Devonian sandstone of the Pļaviņu and Gauja formations. Formed roughly 370 million years ago, this hard, reddish-brown rock is the foundation of the region. In the Devonian period, this part of Baltica was a warm, shallow sea near the equator, collecting sands that would compact into stone over eons.
This sandstone is not merely a historical curiosity. It has been a fundamental natural resource for centuries, quarried locally for building. Its durability is evident in the oldest structures. But today, this ancient rock holds a new, profound significance. It is a carbon sink. The sandstone, and the fossils it sometimes contains, are a physical record of a long-ago carbon cycle. It reminds us that the carbon we are now recklessly pumping into the atmosphere was once sequestered in rock and fossil over millions of years. The contrast between the slow, geological-scale carbon storage underfoot and the frantic, human-scale carbon release above is a silent, powerful juxtaposition that defines our Anthropocene epoch.
Furthermore, these porous sandstone layers, along with the overlying glacial aquifers, are critical sources of groundwater. This connects Jēkabpils directly to the global hotspot of water security. The quality and quantity of this water, filtered slowly through these ancient sands and gravels, are vulnerable to modern threats: agricultural runoff, industrial contamination, and unsustainable extraction. The clean water from your tap in Jēkabpils is a gift of the Ice Age and the Devonian period—a finite inheritance we are tasked with protecting.
The seemingly placid landscape of Jēkabpils is a stage where multiple global crises converge in subtle but undeniable ways.
The Daugava is no longer just a historical transport route or a source of hydropower downstream. It has become a frontline in the climate crisis. Increased precipitation and warmer winters are altering its flow regime. The threat of more frequent and severe flooding of its low-lying plains is a direct local manifestation of global atmospheric changes. The very floodplains created by glacial meltwater are now at risk from a new type of meltwater—this time from anthropogenic warming. The city’s historical relationship with the river is being rewritten by climate models, forcing a reevaluation of land use and flood defenses, mirroring challenges from the Mississippi to the Mekong.
The mosaic of habitats created by the glacial retreat—riverine ecosystems, floodplain forests, pine forests on sandy outwash plains, and oligotrophic lakes—created a unique biodiversity hotspot. These are refugia for species that adapted to the post-glacial environment. Today, habitat fragmentation from agriculture, drainage, and infrastructure pressures this delicate network. The struggle to maintain the ecological integrity of the Daugava’s banks and the surrounding forests is a micro-battle in the global war against biodiversity loss. It’s about protecting not just individual species, but an entire geological legacy of life that recolonized after the ice.
Look at the sand and gravel quarries again. They are not just holes in the ground. They are sources of critical raw materials for the construction industry, linking this quiet region to national and European supply chains and economic stability. Furthermore, Latvia’s strategic focus on energy independence and security resonates here. While not an oil or gas region, the push for renewable energy and resilient infrastructure depends on these very local resources—from the aggregates for building wind farm foundations to the stable geological substrates for new projects. In a world rethinking its energy map, even the glacial till of Jēkabpils has a role to play.
Standing on the banks of the Daugava in Jēkabpils, you are standing at a confluence far greater than that of two rivers. You are at the confluence of deep time and the urgent present, of natural archives and human-induced change. The clay under your feet remembers the ice. The sandstone beneath it remembers a tropical sea. The river’s flow is now gauged against the rising thermometer of the planet. This is the profound lesson of this place: geography is not destiny, but it is context. The geological and geographical gifts of the past—the fertile plains, the steady river, the abundant minerals—provided the foundation for life here. Our responsibility in the 21st century is to understand that these systems are not static. They are dynamic, and they are responding to the immense pressure of our global civilization. To read the landscape of Jēkabpils is to understand that we are all, ultimately, living on borrowed terrain from the Ice Age, and the terms of that loan are rapidly changing.