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Terra Rossa

Smiling child holding up both hands stained bright orange-red with clay, with smears of it on one cheek, in front of a blurred green and red-earth background. — A mini-experiment by a mini-scientist Antonio Jordán

Tall grey limestone pinnacles with fluted surfaces rising from bright red clay soil, topped by green shrubs and small trees under a cloudy sky. — Born to be red (How do Mediterranean red clayey soils form?) Antonio Jordán

Person with a backpack standing on a red earth path between two tall, narrow grey limestone pillars, with trees and a cloudy sky behind. — Blood and stone giants Antonio Jordán

Close-up of a crumbly reddish-brown clay soil horizon broken into blocky lumps, dotted with white chalky nodules filling cracks and holes. — Calcium carbonate concretions in a soil horizon Antonio Jordán

Hand holding a lump of reddish-brown soil speckled with many white chalky spots and patches of calcium carbonate, against a pale sandy soil wall. — Calcium carbonate concretions in a soil aggregate Antonio Jordán

Small pit of bright red soil between pale limestone boulders, with an extended tape measure and a yellow label numbered 139 standing in it, grass and shrubs around. — Chromic Luvisol Antonio Jordán

Open steel auger holding a core of bright red soil with small white nodules, lying on cloddy red ground beside the leg and boot of a person. — Red soil profile extracted with an auger Antonio Jordán

Ploughed field of bright red soil in small clods with scattered pale stones and faint lines of tracks running into the distance. — Cropped red soils in SW Spain Antonio Jordán

Jagged grey and white limestone pinnacles streaked with rusty red rising above green shrubs, with more pointed rock towers to the right under a blue sky with white clouds. — Stone forest (Cerro del Hierro) Antonio Jordán

Close-up of cracked bright red soil with dark spots and a pale yellowish band along a crack, with a cigarette lighter placed for scale. — Soil colours indicate different processes Antonio Jordán

Close-up of fingers holding a small round concretion, its broken face orange-brown with patches of black coating, against a blurred blue sky and red ground. — Manganese and iron covering a carbonate concretion Antonio Jordán

Hand holding a heart-shaped lump of red soil speckled with black spots, against a blurred green background. — Manganese black spots in red soil Antonio Jordán

Close-up of fingers holding a thin flake of red soil seen edge-on, dotted with black specks, with a blurred person behind. — Manganese black spots in red soil Antonio Jordán

Smiling person in a blue T-shirt and blue sunglasses holding a large lump of red soil in front of a deep red soil wall. — Red soil aggregate from a paleosoil in Mallorca Island (Spain) Antonio Jordán

Large chunk of red soil held in a hand while another hand pours liquid onto it from a white bottle with a blue cap, over red ground. — Manganese black spots in soil Antonio Jordán

Terra rossa near São Brás de Alportel (southern Portugal) Antonio Jordán

Exposed bank of deep red soil studded with pale limestone blocks and scattered stones, below a dense green shrub. — Terra rossa near São Brás de Alportel (southern Portugal) Antonio Jordán

Bank of dark red soil with many angular cream limestone fragments and larger pale rock outcrops at the bottom, under green shrubs with red berries. — Terra rossa near São Brás de Alportel (southern Portugal) Antonio Jordán

Lithic Rhodoxeralf Jorge Mataix-Solera

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