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Example	Size of File	Locality	Characteristics	Interpretation
	Fig.38, 5/26 kb	Central Portugal, Consolação	Reef meadow composed of one single coral species (Calamophylliopsis)	Stress environment directly at the coast, plagued by frequent storms and sedimentation events
	Fig.39, 6/29 kb	Central Portugal, Gosundeira	A large branching coral colony (Ovalastrea plicata) from a reef composed of many different coral species	Optimum growth conditions in shallow waters without sedimentation stress
	Fig.40, 9/30 kb	Eastern Spain, Jabaloyas	Coral reefs with pronounced relief are restricted to a distinct horizon	Optimum growth condition in shallow waters only during a certain time episode which is represented by the reef horizon
	Fig.41, 12/48 kb	Eastern Spain, Jabaloyas	A coral reef from above horizon. The coral reef contains a high amount of microbial crust and exhibits a pronounced relief	Optimum growth conditions in shallow waters without sedimentation stress
	Fig.42, 6/18 kb	Southern Portugal, Lagoa dos Cavalos	Coral meadow composed of one single, branching coral species (Actinastrea ramulifera)	Only short-termed growth in shallow water, truncated by storm
	Fig.43, 8/39 kb	Southern Portugal, Conceicao	Coral reef composed of many different massive corals overgrowing each other	Optimum growth conditions in shallow waters of fairly high (but not too high) water energy
	Fig.44, 9/41 kb	Central Portugal, Arruda dos Vinhos	Coral reef made of different coral species. Dish-shaped colonies (Microsolena, arrow) and solitary corals growing on top of each other (Trocharea cf. gregoryi, V-mark) are particularly frequent	The relatively high proportion of dish-shaped coral colonies and the occurrence of certain siliceous sponges indicate slightly deeper waters. Nevertheless, species richness is fairly high
	Fig.45, 7/25 kb	Southern Portugal, Tavira	Coral reef containing numerous siliceous sponges (not visible at this scale). Arrows point to the colonies of the predominant, up to one meter large, dish-shaped flower coral species.	The very reduced species number, the exclusive occurrence of dish-shaped corals (cf. Microsolena) adapted to low illumination, and the frequent occurrence of siliceous sponges indicate growth in waters several tens of meters deep. This is at the lower margin of growth of reef corals.

Example	Size of File	Locality	Characteristics	Interpretation
	Fig.46, 18/17 kb	Northern Switzerland nearby Basel	Sponge meadow composed of large, dish-shaped siliceous sponges	Relatively good growth conditions in water depths of several tens of meters.
	Fig.47, 4/36 kb	Southwestern Germany, Gosheim	Large sponge reef composed of microbial crusts, siliceous sponges and calcareous mud	Good growth conditions in waters several tens of meters deep. Occasional, but generally low sediment influx was collected by microbial films and helped the reef mound to build up.
	Fig.48, 7/22 kb	Polen, nearby Tschenstochau	Spectacular sceneries are formed by relics of Jurassic sponge reefs. This rock formation does not correspond to the original reef morphologies. Comparable reef relics exist in southern Germany (Swabian and Franconian Alb).	Growth conditions as in the above example
	Fig.49, 7/20 kb	Southwestern Germany, nearby Münsingen	Polished rock slab shows the typical composition of these reefs. White arrows: Sections across tube-shaped siliceous sponges. Black arrows: Microbial crusts within and at the outer side of sponges. Rest of rock is composed of former calcareous mud	Growth conditions as in the two previous examples
	Fig.50, 8/28 kb	Southern Portugal, Alfarrobeira	Thin-section microphotograph of a sponge limestone. Clearly visible is the netlike sponge-needle (spicula) skeleton of a siliceous sponge. Dark dots and streaks represent microbial crusts or their reworked remnants. Light gray colored material (rest of photo) represents former calcareous mud

Example	File Size	Locality	Characteristics	Interpretation
	Fig.51, 5/37 kb	Southern Portugal, Cotovio	A conical small reef almost exclusively composed of microbial crusts	Accompanying organisms (especially ammonites and belemnites) indicate open marine conditions in somewhat deeper water. Bottom waters were depleted with oxygen, so that most other bottom dwellers such as siliceous sponges could not - or only very sporadically - grow there.
	Fig.52, 5/40 kb	same locality as above	Top view of the club-shaped little microbial crust reefs positioned close to each other. The polygon pattern results from this crowded occurrence of reef bodies
	Fig.53, 12 kb	same locality as above	Formation of glauconite (green) at the top surface of a microbial crust reef. The mineral which forms at the sea floor under partial lack of oxygen contains reduced iron which causes its green color.
	Fig.54, 6/21	Central Portugal, Arruda dos Vinhos	The clam Aulacomyella abadiensis dwelled on Jurassic sea floors and occurs occasionally in the pure microbial crust reefs	It is known that this clam lived exclusively under very reduced oxygen concentration and therefore represents a perfect indicator for episodes of oxygen depletion. This is in contrast with the microbial crusts which could grow with or without oxygen
	Fig.55, 3/16	Southern Portugal, Cotovio	Polished rock slab from a microbial crust reef. Crusts form the reef framework. Calcareous mud settled down in some small cavities. Greenish colors are due to glauconite, a mineral which forms under oxygen depletion at the sea floor.
	Fig.56, 5/16 kb	Southern Portugal, Rocha	Microscopic, largely magnified photograph of a microbial crust. The dark particles with irregular outlines represent calcified sugary slimes produced by microbes. Their arrangements in filaments is occasionally still visible (arrow).