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পৃথিবী সৃষ্টির সময় ভূপৃষ্ঠে সর্বপ্রথম যেসব ভূমিরূপের সৃষ্টি হয়, তাদের প্রথম ক্রম ভূমিরূপ বলে। যেমন—মহাদেশ ও মহাসাগর।
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পৃথিবী সৃষ্টির সময় ভূপৃষ্ঠে সর্বপ্রথম যেসব ভূমিরূপের সৃষ্টি হয়, তাদের প্রথম ক্রম ভূমিরূপ বলে। যেমন—মহাদেশ ও মহাসাগর।