Cnidaria is a phylum within Kingdom Animalia which consists of hydras, jellies (or jellyfish), sea anemones, and corals. All cnidarians are radially symmetrical, and there are two main radially symmetrical body types.
The stock market crash, on black Tuesday (October 29, 1929) began the Great Depression.
Timelines Of The Great Depression. The Great Depression and its effects lasted more than a decade, from 1929 until 1941. Click here for more facts about timelines of the Great Depression. Following are some of the key dates in the timeline of the Great Depression: October 29, 1929: Stock market crashed, Black Tuesday. 1930: Severe drought and Dust Bowl conditions began to ruin farmersâ land, a condition that lasted until 1935.