The Pebbles Crater, also known as the Meteor Crater or Barringer Crater, near Winslow, Arizona, has a roughly circular shape with a diameter of about 1.2 kilometers (0.75 miles). It features a bowl-like depression with steep inner walls and a relatively flat floor. The crater's formation resulted from a high-velocity meteor impact, which contributed to its distinct circular profile.
Since we cannot see either your pebble or the photo, we cannot answer the question for you.
I am not exactly sure but I have a good scientific guess. No because the crater is always bigger than the meteor so it starts forming a circle when it comes out because the pressure is so hard that it will tear the shape a part as it forms.
Four main causes: 1) Erosion due to weather, etc. 2) Concealment by sedimentary deposits. 3) Most of the Earth's surface is water. 4) Plate tectonics changes the Earth's surface. _________________________________ One other significant factor is that some of the impact craters are so enormous that we fail to recognize the typical "crater" shape until we can see it from space, or at least from high altitude. There's a new generation of meteor crater hunters who never leave their desks, who search Google Earth for the telltale signs of "ring" mountains . Of course, some meteor craters are as obvious as can be; the classic Barringer Meteor Crater near Winslow, Arizona, for example.
It has no particular shape. It is a rock
The formation of the Meteor Crater played a role in the geological history and landscape evolution of the Grand Canyon by demonstrating the impact of meteorites on the Earth's surface. This impact event helped shape the landscape of the region and influenced the formation of the Grand Canyon over millions of years through erosion and other geological processes.
Pebbles are solid.
A hole in the ground caused by a meteorite is called a meteorite crater. These craters are formed when a meteorite impacts the Earth's surface, creating a depression due to the immense energy released during the collision. The size and shape of the crater can vary depending on the size, speed, and angle of the impacting meteorite. Notable examples include the Barringer Crater in Arizona and the Chicxulub Crater in Mexico.
This is known as an impact crater. Please see the related link.
Craters are depressions in a planet's or moon's surface caused when a meteor hits the surface. On the moon craters remain undisturbed because there are no environmental forces like wind and rain to disturb resulting shape of the crater.
Crater
Assuming the question refers to the crater of an astrobleme, as opposed to a volcanic crater or a man-made one, the mass, velocity and angle of the the impacting object.
Both the shape of my pebble's crater and the impact crater in the photo appear to be circular. This indicates that the impact was perpendicular to the surface, creating a symmetric circular pattern. The edges of the craters in both cases also seem slightly raised, indicating the displacement of material upon impact.