Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. Seafloor spreading helps explain continental drift in the theory of plate tectonics.he destruction of oceanic crust occurs at subduction zones where oceanic crust is forced under either continental crust or oceanic crust. Today, the Atlantic basin is actively spreading at the Mid-Atlantic Ridge. Only a small portion of the oceanic crust produced in the Atlantic is subducted.
April sees the weather continue to improve in Krakow, Poland, as the average temperature doubles to 8 C. The average high is 12Â°C and the average low 3Â°C, so April is the first month of the year that does not reach freezing temperatures.t is, along with May, the least humid month of the year at 70%, and there are 11 hours of sunshine per day? making it one of the sunniest months of the year. April hosts the Easter celebrations, and these include religious ceremonies and parades, along with various events being held around the Wawel Cathedral.
StayPoland - Poland, made perfect. Weather in Poland. Poland lies in a moderate zone with mixed continental and oceanic climate influences. The warmest areas of the country are the Silesian Lowland and Sandomierska Upland, while the âcoldest poleâ of Poland is the town of Suwalki on the north-eastern edge of the country.