As people are tucking into Easter eggs today, here's a list of some of the *absolute worst* substitutes for chocolate eggs that #geology can offer you. Consider yourself warned.

A THREAD

(1/n)

Type: onion-skinned weathering of massive rocks (including sandstones and granites).

How: formed by weathering along spheroidal fracture planes within the rock mass

Why is bad: it's rock, so will break your teeth, and doesn't at all taste like chocolate

(2/n)

Type: concretions within sedimentary rock (often sandstones)

How: formed by precipitation of minerals around a central mass within sedimentary rock or soil

Why is bad: it's also rock, so will break your teeth, and doesn't at all taste like chocolate either

(3/n)

Type: pillow basalts

How: formed by toothpaste-like extrusion eruption of basalt onto seafloors under substantial water pressure

Why is bad: neither a pillow, nor chocolate, this is one of the worst choices you could make

(4/n)

Type: volcanic bombs

How: forms when lava is exploded out of a volcano, and the molten material cools as it ballistically flies through the air

Why is bad: sharp (can contain lots of volcanic glass), can kill you if it lands on you, generally unpleasant

(5/n)

Type: dinosaur egg

How: made the way most eggs are made, but these ones are fossilised (so no original egg material survives—sorry InGen)

Why is bad: is really just stone now, and if dinosaurs find out you've stolen their eggs you're in trouble (ref: Jurassic Park 3)

(6/n)

And that's your short don't-eat-stones-for-Easter-eggs PSA. If you must indulge in chocolate today, then you could do worse than eating a couple dozen of these beauties

(7/7)