In rocks of the Mesozoic era, gastropods are slightly more common as fossils; their shells are often well preserved.
In rocks of the Mesozoic era gastropods are more common as fossils and their shell is often well preserved.
In rocks of the Mesozoic era gastropods are more common as fossils and their shell is often well preserved.
بسط الجملة: In rocks of the Mesozoic era, gastropods are slightly more common as fossils; their shells are often well preserved. خرج: