How big are dinosaur eggs?

The minimum diameter is less than10cm; The big one has a long diameter of more than 50 centimeters. The outer surface of the eggshell is smooth or punctate. The shapes of dinosaur eggs are round, oval, oval, rectangle and olive.

Dinosaur eggs, like the eggs of living crocodiles or birds, are made of a layer of hard shell units with calcite microcrystals as the main component in different arrangements, and the eggshell is wrapped with egg white and yolk. In the long geological history, these hard calcareous eggshells have been preserved and fossilized, and the egg white or yolk in them has been decomposed or replaced in the fossilization process. Therefore, "dinosaur egg" has become a very important material to study the formation and evolution of chorionic eggs.

Extended data:

Breeding mode

The spawning habits and behaviors of dinosaurs are somewhat similar to those of turtles. During the breeding season, turtles often flock to favorable beaches to nest and lay eggs. After giving birth, pick some sand to bury the eggs and naturally hatch with the help of the heat provided by the sun.

According to the concentration of dinosaur eggs buried, egg fossils are produced in nests, and the burial place of egg fossils is generally located at the edge of ancient lake basin. It can be speculated that dinosaurs also laid eggs in groups during the breeding season. The spawning place is the lakeshore where plants grow luxuriantly, and they don't seem to have strict choices about the texture of the lakeshore. Different dinosaurs laid eggs in different ways, and the eggs were arranged in their nests in different ways.

For example, before the dinosaurs laid their eggs, they piled up a slightly convex one with mud at the selected place, and then placed the eggs around them, all of which were arranged in pairs and radially. After laying a layer of eggs, they bury some soil before laying eggs, forming a nest composed of dozens of eggs, and finally cover it with some silt;

Dinosaurs that laid round eggs would dig some nests in selected places before laying eggs, then lay eggs in the nests, scrape some sediment and bury them after laying eggs. Eggs laid in this way are arranged irregularly in the nest or they are closer together. Besides, there may be other ways. As for whether the female dinosaur should protect her eggs after laying them, or sit in the nest and hatch them like a hen, there is still no conclusion.

Baidu encyclopedia-dinosaur egg

People's Daily Online-Discovery of New Dinosaur Eggs in Huangshan Area