SRS9631058 SAMN20426998 1311626 rock metagenome Large traslucent gypsum rocks with cristals (decimeter in diameter). The crystals are interlayered by greenish layers of photoautotrophs up to 20 cm deep from the soil. 20% slope facing north-east bioproject 749949 PRJNA749949 host not applicable isolation_source Large cristalized traslucent gypsum blocks collection_date 2018-12-27 geo_loc_name Algeria: El Oued , Mrara, Sahara desert lat_lon 33.23864 N 5.57325 E BioSampleModel Metagenome or environmental SRS9631059 SAMN20426999 1311626 rock metagenome The site is located on a plateau The gypsum-limestone crust is hard and compact. Thin endolithic layers of photoautotrophs were observed right under the surface of gypseous blocks. bioproject 749949 PRJNA749949 host not applicable isolation_source Gypsum-Limestone Rocks from a Plateau collection_date 2018-12-27 geo_loc_name Algeria: Ouargla, Gypsum Plateau of Mallala , Sahara desert lat_lon 32.54668 N 5.32157 E BioSampleModel Metagenome or environmental SRS9632281 SAMN20426997 1311626 rock metagenome Medium size (decimeter in diameter) of cristalized gypsum rocks from and old lake. Flat. The crystals are interlayered by greenish layers of photoautotrophs up to 10 cm deep from the soil bioproject 749949 PRJNA749949 host not applicable isolation_source Cristalized traslucent gypsum rocks from a fossil lake collection_date 2018-12-27 geo_loc_name Algeria: Ouargla, Sebkha Mallala, Sahara desert lat_lon 32.6775 N 5.72917 E BioSampleModel Metagenome or environmental SRS9633650 SAMN20426996 1311626 rock metagenome Hypolithic small siliceous rounded rocks (0.5-2 cm) from an old river. Slope <10% southern exposure. bioproject 749949 PRJNA749949 host not applicable isolation_source Below siliceous rounded gravel (0.5-2 cm) from a Quaternary alluvial terrace collection_date 2018-12-27 geo_loc_name Algeria: Ouargla, Hassi Miloud, Sahara desert lat_lon 31.592987 N 5.244833 E BioSampleModel Metagenome or environmental