○○○ bedrock ⪢⪢
Finally and most
importantly, mountains have deformed bedrock, meaning the layers of rock beneath the surface have been folded, faulted and tilted by the movement of Earth's crust.
http://qindex.info/i.php?x=16113
○○○ plateau ⪢⪢
Like a mountain a plateau tends to have high elevation different though in that it has very little relief it tends to be fairly flat. Most
importantly plateaus do not have deformed bedrock rather they have horizontal or flat bedrock layers.
→ prairie
http://qindex.info/i.php?x=16114
○○○ 1054 ⪢⪢
The eldest son gets the most
important title of Grand Prince of Kiev. After his death, the cadet will take his place and the princes will change thrones.
http://qindex.info/i.php?x=12941
○○○ 1202 ⪢⪢
At the same time, a fourth crusade, initially sent to the Holly Land, is diverted to Constantinople. The city is besieged and then pillaged.
The Byzantine Empire finds itself divided and Kievan Russia loses an
important ally.
→ divert, besiege, pillage
http://qindex.info/i.php?x=17650