For this church:
The Porch and most of the dressed ashlar and carved stonework of the quoins and buttresses, and in the window and door mouldings is yellow brown (when weathered) ooidal and shelly limestone from Lincolnshire Limestone Formation (middle jurassic). It is quite distinctive being very coarse grained with large shells and rounded ooid grains. Where it is surface weathered it is possible to see much of the internal sedimentary features such as worm burrows.
The gable wall fabric of the tower end includes large blocks of pale grey skerry sandstone (Upper Triassic, Mercia Mudstone group) with Lincolnshire limestone window mouldings. The tower, itself, is a mix of Lincolnshire limestone with small thinly laminated wallstones of limestone from the Lias Group (Lower Jurassic) and some skerry sandstone. The spire is Lincolnshire limestone.
The north wall of the nave is a similar mix of Lias limestone (new pale grey blocks) and old slabby stone between the brick buttresses. The south wall is ashlar blocks of Lincolnshire limestone throughout.
The chancel, in contrast, has on the north wall pale grey skerry sandstone in the lower courses below the window and Lincolnshire limestone ashlar and Lias limestone blocks above. The south wall is a mix of Lias limestone (lots of newish grey Lias limestone repair with Lincolnshire limestone mouldings,strings and buttresses. The window mouldings are,again, Lincolnshire limestone. The stone buttresses include both Lincolnshire limestone and skerry sandstone blocks.
At the double-aisled gable end there is a mix of ooidal and shelly Lincolnshire limestone, thinly bedded, laminated Lias limestone and new repair with thicker pale grey lias limestone.
Thanks to Dr Graham Lott for this entry