The Baltic Coastal Plain stretches across northern Poland from Germany to Russia, forming a low-lying region built of various sediments. It is largely occupied by the ancient province of Pomerania (Pomorze), the name of which means “along the sea.” The scarcely indented Baltic coastline was formed by wave action after the retreat of the ice sheet and the raising of sea levels. The Pomeranian (Pomorska) Bay in the west and the Gulf of Gdańsk in the east are the two major inlets. In the southern portion of the former, two islands block off the Szczeciński Lagoon (Zalew Szczeciński), into which the Oder River discharges its waters. In the Gulf of Gdańsk, the Vistula (Wisła) River forms a large delta. Sandbars, on which the winds have created large dunes, line much of the coast, separating the coastal lakes and lagoons from the sea.
The main urban centres are the ports of Szczecin (German: Stettin) on the lower Oder and Gdańsk (German: Danzig) and Gdynia in the east. The central portion of the Baltic Coastal Plain is scantily populated—there are only small fishing ports, of which Kołobrzeg is the most important—and the landscape has a desolate beauty.
Gdańsk, Poland.© Jaroslaw Grudzinski/Shutterstock.com
The lake region and central lowlands
The belt immediately to the south of the coastal plain is a varied landscape with lakes and hills of glacial origin. Wide river valleys divide the region into three parts: the Pomeranian Lakeland (Pojezierze Pomorskie); the Masurian (Mazurskie) Lakeland, east of the lower Vistula; and the Great Poland (Wielkopolskie) Lakeland. The larger settlements and the main communications routes of this zone lie in and along the river valleys; the remainder of the area is mostly wooded and thinly populated. Only the eastern portion of the Great Poland Lakeland has a developed agriculture.
The extensive central lowlands contain isolated relief features shaped by the oldest glaciations, but their character is generally flat and monotonous. The postglacial lakes have long since been filled in, and glacial outwash masks the weakly developed meltwater valley channels. The basins of the main rivers divide the area into the Silesian (Śląska) Lowland, which lies in the upper Oder; the southern Great Poland Lowland, which lies in the middle Warta River basin; and the Mazovian (Mazowiecka) and Podlasian (Podlaska) lowlands, which lie in the middle Vistula basin. Lower Silesia and Great Poland are important agricultural areas, but many parts of the central lowlands also have large industrial centres. Warsaw, the capital, situated on the middle Vistula, is the most prominent. The Little Poland Uplands
South of the central lowlands, the Little Poland Uplands extend from east to west, but they are folded transversely. In the west is the Silesian-Kraków upthrust, with rich deposits of coal. The ancient rocks of the Świętokrzyskie (“Holy Cross”) Mountains, which reach a maximum elevation of 2,008 feet (612 metres), form a second upthrust. Between these two regions lies the Nida River basin, with an average height of 650 to 1,000 feet (198 to 305 metres). East of the Świętokrzyskie Mountains, the uplands are cut by the valley of the Vistula, beyond which lie the Lublin (Lubelska) Uplands. In the south occur patches of loess on which fertile brown- and black-earth soils have developed.
The older geologic regions contain valuable minerals; in the Silesian-Kraków uplands there are coal, iron, zinc, and lead deposits. These mineral resources have made possible the rise of Poland’s most important industrial region, and the landscape of Upper Silesia is highly urbanized. Katowice is the largest centre, and the region is closely linked with that around Kraków (Cracow). The Little Poland Uplands protect the Little Poland Lowlands, in which Kraków lies, from the colder air of the north. To the north the Staropolski (“Old Polish”) Basin, situated in the foothills of the Świętokrzyskie Mountains, has a long history of industrial production. Kielce is the area’s urban centre. The Sudeten
The Sudeten and their foreland, part of the larger Bohemian Massif, have a long and complex geologic history. They owe their present rugged form, however, to earth movements that accompanied the Carpathian uplift, and the highest portion, the Karkonosze (“Giant Mountains”), reaches 5,256 feet (1,602 metres) above sea level. The region contains rich mineral deposits, notably coking coal, which has occasioned the growth of an industrial centre around Wałbrzych. The region has many small towns. Resorts and spas are found in more-secluded areas. The foreland of the Sudeten, separated by a large fault from the larger mass, contains many granite quarries. The Carpathians
The southernmost, and most scenic, portion of Poland embraces the Carpathian Mountains and their associated chains and basins, created in the Paleogene and Neogene periods. Within the Polish frontiers lie the Oświęcim and Sandomierz basins, a portion of the Beskid Mountains, the Orawka-Podhale Basin, and the Tatra (Tatry) Mountains. The sub-Carpathian basins contain deposits of salt, sulfur, and natural gas and some petroleum. The region has a large rural population, but there are also many towns of medium size.
A peak in the Tatra Mountains in Poland near the Slovakian border.Eastfoto
The highest peak of the Beskid Mountains, Mount Babia, reaches 5,659 feet (1,725 metres); the Tatras, with a maximum elevation of 8,199 feet (2,499 metres), are the highest portion of the Polish Carpathians. Zakopane, the largest tourist and resort centre in Poland, lies at their feet. The Bieszczady Mountains—rolling, carpeted in beech woods, and sparsely inhabited—lie in the extreme southeast. Drainage and soils
The Vistula, Poland's longest river, flows past the Old Town section of Warsaw.D.C. Williamson, London
The Elbe, Oder, and Vistula river basins and their drainage network.Encyclopædia Britannica, Inc.Virtually the entire area of Poland drains to the Baltic Sea, about half via the Vistula River and a third via the Oder River. Polish rivers experience two periods of high water each year. In spring, melted snow swells the lowland rivers. The presence of ice dams (which block the rivers for one to three months) and the fact that the thaw first strikes the upper reaches of the northward-flowing rivers intensify the effect. The summer rains bring a second maximum about the beginning of July.
There are some 9,300 Polish lakes with areas of more than 2 1/2 acres (1 hectare), and their total area is about 1,200 square miles (3,108 square km), or 1 percent of the national territory. The majority, however, are found in the northern glaciated belt, where they occupy more than 10 percent of the surface area.
Polish soils are varied and without clearly marked regional types. The greatest area is covered by podzol and pseudopodzol types, followed by the less widely distributed brown-earth soils, which are richer in nutrients. In the south are extensive areas of fertile loess-based soils. The rendzinas, formed on limestone rocks, are a unique type. The alluvial soils of the river valleys and the peaty swamp soils found in the lake area and in poorly drained valleys are also distinctive. Climate