Paleozoic Era Mesozoic Era Cenozoic Era Began with the early Reptiles were the New mammals o such as animals of this invertebrates, trilobites dominant appeared while and brachiopods; continued to era, including the various others became develop early vertebrate fish, dinosaurs. extinct. then arachnids and insects; later Small mammals and The diversity of o o came the first amphibians, and birds also appeared. life forms near the end the reptiles era’s increased. became dominant. Toward the end of the o era, flowering plants Flowering plants included o Early land plants o appeared and the kinds of became most simple mosses, ferns, and then mammals increased. common. cone-bearing plants. The mass extinction Humans are o By the end of the era, seed o o that ended the era caused also part of the plants were common. the dinosaurs to become most recent period The mass extinction that ended extinct. of this era. o the era caused most marine A major geologic Present day o o invertebrates as well as event of the Mesozoic Earth is in this era. amphibians to disappear. was the break-up of the A major A major geologic event of the o super continent of o geologic event of Paleozoic was the formation of the Pangaea into several the Cenozoic is the super continent of Pangaea. large continents. further splitting and moving of continents to their current positions.
Paleozoic Era Mesozoic Era Cenozoic Era Began with the early invertebrates, such as trilobites and brachiopods; continued to develop early vertebrate fish, then arachnids and insects; later came the first amphibians, and near the era’s end the reptiles became dominant. o Early land plants included simple mosses, ferns, and then cone-bearing plants. o By the end of the era, seed plants were common. o The mass extinction that ended the era caused most marine invertebrates as well as amphibians to disappear. o A major geologic event of the Paleozoic was the formation of the super continent of Pangaea. Reptiles were the dominant animals of this era, including the various dinosaurs. o Small mammals and birds also appeared. o Toward the end of the era, flowering plants appeared and the kinds of mammals increased. o The mass extinction that ended the era caused the dinosaurs to become extinct. o A major geologic event of the Mesozoic was the break-up of the super continent of Pangaea into several large continents. o New mammals appeared while others became extinct. o The diversity of life forms increased. o Flowering plants became most common. o Humans are also part of the most recent period of this era. o Present day Earth is in this era. o A major geologic event of the Cenozoic is the further splitting and moving of continents to their current positions.
Geologic%20Timeline%20Notes%202.docx